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![Plot of CaO vs. Fe2O3 (in oxide weight percent) for glass shards from tephra layers of the Trapper Creek section, Idaho, including the Ibex Hollow Tuff within the section, and distal tephra layers correlated to the Ibex Hollow Tuff (see Fig. 1 for locations; see Fig. 2 for stratigraphy of Trapper Creek section). Analyses by electron microprobe (EMA). Samples of the Trapper Creek section were analyzed at the University of Utah, Salt Lake City, Utah, and at the U.S. Geological Survey, Menlo Park, California. Distal samples of the Ibex Hollow Tuff were analyzed at the latter laboratories and at the University of Toronto, Canada. CPT—Cougar Point Tuff. See text and Table 2.]()
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![Plot of Sm vs. Dy for samples of the Trapper Creek section, Idaho, the Ibex Hollow Tuff within the section, and the Ibex Hollow Tuff at distal sites (see Fig. 1 for locations and abbreviations; see Fig. 2 for stratigraphy of the Trapper Creek section). CPT—Cougar Point Tuff; INAA—instrumental neutron activation analysis; LA-ICP-MS—laser-ablation–inductively coupled plasma–mass spectrometry.]()
![Plot of Hf vs. Eu for glass shards from tephra layers of the Trapper Creek section, Idaho, the proximal Ibex Hollow Tuff within this section, and the Ibex Hollow Tuff at distal sites (see Fig. 1 for locations and abbreviations; see Fig. 2 for stratigraphy of the Trapper Creek section). CPT—Cougar Point Tuff; INAA—instrumental neutron activation analysis; LA-ICP-MS—laser-ablation–inductively coupled plasma–mass spectrometry.]()
![(A, B) Plots of rare earth element (REE) concentrations in glass shards for the Ibex Hollow Tuff (IHT) in the Trapper Creek, Idaho, section as ratios to those in a chondrite (Boynton, 1992), where analyses were by instrumental neutron activation analysis (INAA) of glass shard separates: (A) Ibex Hollow Tuff (IHT) samples at Trapper Creek, Idaho (both ash flow and ash fall) compared to distal samples that we correlate here with the Ibex Hollow Tuff. Values are ratios of the REEs in the volcanic glass divided by the concentration of the same elements in a chondrite meteorite (Boynton, 1992). The patterns here stack almost exactly one on top of the other. (B) REE patterns from A, above, separated out to illustrate the similarity of the Ibex Hollow Tuff at proximal and distal locations. Tephra localities are color coded, with the key to the localities shown in the box. See Figure 1 for locations. (C, D) Plots of REE concentrations for the IHT in the Trapper Creek, Idaho, section, as ratios to a chondrite (Boynton, 1992), where glass shards were analyzed by INAA of bulk glass shard separates, and by laser-ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) of individual shards: (C) INAA (solid lines) analyses of glass shard separates and LA-ICP-MS (dashed lines) analyses of individual glass shards. The patterns are stacked here, with those for the INAA almost one on top of the other, and those for the LA-ICP-MS showing somewhat greater scatter. (D) REE patterns from C, above, separated out to illustrate the similarity of the Ibex Hollow Tuff at proximal and distal locations. INAA analyses, in solid lines, show less scatter than the LA-ICP-MS analyses, shown in dashed lines. Tephra localities are color coded, with the key to the localities shown in the box. Abbreviations at end of sample name correspond with locations on Figure 1. DSDP—Deep Sea Drilling Project; TC—Trapper Creek type section. (E) Rare earth element (REE) diagram of Ibex Hollow Tuff (IHT) at Trapper Creek section, Idaho (both ash flow and ash fall, averaged), compared with tephra layers situated stratigraphically above the Ibex Hollow Tuff in the section (see Figs. 1 and 2). Analyses of glass shard separate by instrumental neutron activation analysis (INAA). Analyses of the Ammonia Tanks and Rainier Mesa, erupted from the Southern Nevada volcanic field, are included here to show the large differences in the REE/chondrite ratios between tephra layers erupted from different volcanic fields. Values are ratios of the REEs in the volcanic glass divided by the concentration of the same elements in a chondrite meteorite (Boynton, 1992). (F) REE diagram of IHT at Trapper Creek section, Idaho (both ash flow and ash fall, averaged), compared with tephra layers situated below the Ibex Hollow Tuff in the section (see Fig. 2). Analyses by INAA of glass shard separate. TC—Trapper Creek type section.]()
![(A, B) Plots of rare earth element (REE) concentrations in glass shards for the Ibex Hollow Tuff (IHT) in the Trapper Creek, Idaho, section as ratios to those in a chondrite (Boynton, 1992), where analyses were by instrumental neutron activation analysis (INAA) of glass shard separates: (A) Ibex Hollow Tuff (IHT) samples at Trapper Creek, Idaho (both ash flow and ash fall) compared to distal samples that we correlate here with the Ibex Hollow Tuff. Values are ratios of the REEs in the volcanic glass divided by the concentration of the same elements in a chondrite meteorite (Boynton, 1992). The patterns here stack almost exactly one on top of the other. (B) REE patterns from A, above, separated out to illustrate the similarity of the Ibex Hollow Tuff at proximal and distal locations. Tephra localities are color coded, with the key to the localities shown in the box. See Figure 1 for locations. (C, D) Plots of REE concentrations for the IHT in the Trapper Creek, Idaho, section, as ratios to a chondrite (Boynton, 1992), where glass shards were analyzed by INAA of bulk glass shard separates, and by laser-ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) of individual shards: (C) INAA (solid lines) analyses of glass shard separates and LA-ICP-MS (dashed lines) analyses of individual glass shards. The patterns are stacked here, with those for the INAA almost one on top of the other, and those for the LA-ICP-MS showing somewhat greater scatter. (D) REE patterns from C, above, separated out to illustrate the similarity of the Ibex Hollow Tuff at proximal and distal locations. INAA analyses, in solid lines, show less scatter than the LA-ICP-MS analyses, shown in dashed lines. Tephra localities are color coded, with the key to the localities shown in the box. Abbreviations at end of sample name correspond with locations on Figure 1. DSDP—Deep Sea Drilling Project; TC—Trapper Creek type section. (E) Rare earth element (REE) diagram of Ibex Hollow Tuff (IHT) at Trapper Creek section, Idaho (both ash flow and ash fall, averaged), compared with tephra layers situated stratigraphically above the Ibex Hollow Tuff in the section (see Figs. 1 and 2). Analyses of glass shard separate by instrumental neutron activation analysis (INAA). Analyses of the Ammonia Tanks and Rainier Mesa, erupted from the Southern Nevada volcanic field, are included here to show the large differences in the REE/chondrite ratios between tephra layers erupted from different volcanic fields. Values are ratios of the REEs in the volcanic glass divided by the concentration of the same elements in a chondrite meteorite (Boynton, 1992). (F) REE diagram of IHT at Trapper Creek section, Idaho (both ash flow and ash fall, averaged), compared with tephra layers situated below the Ibex Hollow Tuff in the section (see Fig. 2). Analyses by INAA of glass shard separate. TC—Trapper Creek type section.]()
![(A, B) Plots of rare earth element (REE) concentrations in glass shards for the Ibex Hollow Tuff (IHT) in the Trapper Creek, Idaho, section as ratios to those in a chondrite (Boynton, 1992), where analyses were by instrumental neutron activation analysis (INAA) of glass shard separates: (A) Ibex Hollow Tuff (IHT) samples at Trapper Creek, Idaho (both ash flow and ash fall) compared to distal samples that we correlate here with the Ibex Hollow Tuff. Values are ratios of the REEs in the volcanic glass divided by the concentration of the same elements in a chondrite meteorite (Boynton, 1992). The patterns here stack almost exactly one on top of the other. (B) REE patterns from A, above, separated out to illustrate the similarity of the Ibex Hollow Tuff at proximal and distal locations. Tephra localities are color coded, with the key to the localities shown in the box. See Figure 1 for locations. (C, D) Plots of REE concentrations for the IHT in the Trapper Creek, Idaho, section, as ratios to a chondrite (Boynton, 1992), where glass shards were analyzed by INAA of bulk glass shard separates, and by laser-ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) of individual shards: (C) INAA (solid lines) analyses of glass shard separates and LA-ICP-MS (dashed lines) analyses of individual glass shards. The patterns are stacked here, with those for the INAA almost one on top of the other, and those for the LA-ICP-MS showing somewhat greater scatter. (D) REE patterns from C, above, separated out to illustrate the similarity of the Ibex Hollow Tuff at proximal and distal locations. INAA analyses, in solid lines, show less scatter than the LA-ICP-MS analyses, shown in dashed lines. Tephra localities are color coded, with the key to the localities shown in the box. Abbreviations at end of sample name correspond with locations on Figure 1. DSDP—Deep Sea Drilling Project; TC—Trapper Creek type section. (E) Rare earth element (REE) diagram of Ibex Hollow Tuff (IHT) at Trapper Creek section, Idaho (both ash flow and ash fall, averaged), compared with tephra layers situated stratigraphically above the Ibex Hollow Tuff in the section (see Figs. 1 and 2). Analyses of glass shard separate by instrumental neutron activation analysis (INAA). Analyses of the Ammonia Tanks and Rainier Mesa, erupted from the Southern Nevada volcanic field, are included here to show the large differences in the REE/chondrite ratios between tephra layers erupted from different volcanic fields. Values are ratios of the REEs in the volcanic glass divided by the concentration of the same elements in a chondrite meteorite (Boynton, 1992). (F) REE diagram of IHT at Trapper Creek section, Idaho (both ash flow and ash fall, averaged), compared with tephra layers situated below the Ibex Hollow Tuff in the section (see Fig. 2). Analyses by INAA of glass shard separate. TC—Trapper Creek type section.]()
![(A, B) Plots of rare earth element (REE) concentrations in glass shards for the Ibex Hollow Tuff (IHT) in the Trapper Creek, Idaho, section as ratios to those in a chondrite (Boynton, 1992), where analyses were by instrumental neutron activation analysis (INAA) of glass shard separates: (A) Ibex Hollow Tuff (IHT) samples at Trapper Creek, Idaho (both ash flow and ash fall) compared to distal samples that we correlate here with the Ibex Hollow Tuff. Values are ratios of the REEs in the volcanic glass divided by the concentration of the same elements in a chondrite meteorite (Boynton, 1992). The patterns here stack almost exactly one on top of the other. (B) REE patterns from A, above, separated out to illustrate the similarity of the Ibex Hollow Tuff at proximal and distal locations. Tephra localities are color coded, with the key to the localities shown in the box. See Figure 1 for locations. (C, D) Plots of REE concentrations for the IHT in the Trapper Creek, Idaho, section, as ratios to a chondrite (Boynton, 1992), where glass shards were analyzed by INAA of bulk glass shard separates, and by laser-ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) of individual shards: (C) INAA (solid lines) analyses of glass shard separates and LA-ICP-MS (dashed lines) analyses of individual glass shards. The patterns are stacked here, with those for the INAA almost one on top of the other, and those for the LA-ICP-MS showing somewhat greater scatter. (D) REE patterns from C, above, separated out to illustrate the similarity of the Ibex Hollow Tuff at proximal and distal locations. INAA analyses, in solid lines, show less scatter than the LA-ICP-MS analyses, shown in dashed lines. Tephra localities are color coded, with the key to the localities shown in the box. Abbreviations at end of sample name correspond with locations on Figure 1. DSDP—Deep Sea Drilling Project; TC—Trapper Creek type section. (E) Rare earth element (REE) diagram of Ibex Hollow Tuff (IHT) at Trapper Creek section, Idaho (both ash flow and ash fall, averaged), compared with tephra layers situated stratigraphically above the Ibex Hollow Tuff in the section (see Figs. 1 and 2). Analyses of glass shard separate by instrumental neutron activation analysis (INAA). Analyses of the Ammonia Tanks and Rainier Mesa, erupted from the Southern Nevada volcanic field, are included here to show the large differences in the REE/chondrite ratios between tephra layers erupted from different volcanic fields. Values are ratios of the REEs in the volcanic glass divided by the concentration of the same elements in a chondrite meteorite (Boynton, 1992). (F) REE diagram of IHT at Trapper Creek section, Idaho (both ash flow and ash fall, averaged), compared with tephra layers situated below the Ibex Hollow Tuff in the section (see Fig. 2). Analyses by INAA of glass shard separate. TC—Trapper Creek type section.]()
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![Stratigraphic section at Trapper Creek, Idaho, showing the position of the Ibex Hollow Tuff relative to other tephra layers within the composite Tuff of Ibex Peak, the relative thicknesses (meters) of the tephra layers, stratigraphic numbers assigned to each tephra layer (SN), 40Ar/39Ar ages (bold type), and interpolated ages (regular type). The Tuff of Ibex Peak is a local subset of the regionally broader Cougar Point Tuff (CPT) recognized in the Bruneau-Jarbidge area ~80 km NW (to the margin of field) to ~150 km NW (center of field) of Trapper Creek. Ages in bold type are 40Ar/39Ar dates, corrected for current Fish Canyon Tuff monitor age of Kuiper et al. (2008) and decay constant of Min et al. (2000). Ages in regular type are the corrected interpolated ages from the dated tephra layers stratigraphically above and below the undated layers. Ages in parentheses are the original 40Ar/39Ar and interpolated ages given in Perkins et al. (1998). Tephra layers in black—tephra falls; tephra layers in gray—ash flows. Figure is modified from Perkins et al. (1995).]()
![Plot of Lu vs. Tb for samples of the Trapper Creek section, Idaho, the Ibex Hollow Tuff within the section, and the Ibex Hollow Tuff at distal sites (see Fig. 1 for locations and abbreviations; see Fig. 2 for stratigraphy). CPT—Cougar Point Tuff; INAA—instrumental neutron activation analysis; LA-ICP-MS—laser-ablation–inductively coupled plasma–mass spectrometry.]()
![Plots of concentrations of Fe2O3, Hf, Rb, and Th vs. age for glass shards from tephra layers at the Trapper Creek section, Idaho. Sequence of tuffs is from Table 6A. The positions of the Ibex Hollow Tuff (IHT), Cougar Point Tuff V (CPT V), and Cougar Point Tuff XIII (CPT XIII) are shown by the dashed lines. The Cougar Point Tuff V and Cougar Point Tuff XIII are the bounding tuffs of the Tuff of Ibex Peak of Perkins et al. (1995). The two points for the Ibex Hollow Tuff show the difference between the coignimbritic(?) and ash-flow phases of this unit. The change in volcanic field from Owyhee-Humboldt (OHVF) to the Bruneau-Jarbidge (BJVF) is indicated by a dashed line and at the right side of the figure.]()
![Correlation of the Ibex Hollow Tuff and underlying and overlying tuffs at sites across the conterminous United States and adjoining ocean areas. Planktonic datum and North American Land Mammal Ages (NALMA) are shown for reference. Solid line through column indicates presences of a particular tephra layer at that site, and associated sample number. The prefix for the location of sites (e.g., NB) is given above each stratigraphic column. Specific sample numbers are given within the columns. For example: EPB-40 is a sample within El Paso Basin, California, that correlates with the 12.22 Ma Cougar Point Tuff (CPT) V ash bed, SN 18, at Trapper Creek, Idaho.]()
![Map of western North America showing the volcanic fields of the Snake River Plain–Yellowstone hotspot and sampling sites of the Ibex Hollow Tuff. The source of the Ibex Hollow Tuff is the Bruneau-Jarbidge volcanic field (BJ; black) with older (Owyhee-Humboldt [OH]) and younger (Twin Falls [TF], Picabo [P], Heise [H], and Yellowstone Plateau [YP]) volcanic fields shown in gray (after Perkins et al., 1998). The Southern Nevada volcanic field (SNVF) is also shown in gray. Ibex Hollow Tuff locations are shown as black squares: Trapper Creek (TC, type locality of the Ibex Hollow Tuff), Hansel Valley (HV), Ambrose Road (AR), Glentana (G), Scobey (S), Ashfall Fossil Beds (AFB), Smith County (SC), Boswell (BW), Huntington Creek (HC), Stewart Valley (SV), Cobble Cuesta (CC), Aldrich Station (AS), Upper White Basin (UWB), El Paso basin (EPB), Deep Sea Drilling Project Site 173 (DSDP 173), and Naples Beach (NB; a.k.a. Dos Pueblos Beach). Black squares for NB and DSDP-173 are sites on the Pacific plate where, based on our calculations, deposition occurred at ca. 12 Ma. Open squares for NB and DSDP-173 indicate where these sites are today after right-lateral movement of the Pacific plate along the San Andreas fault system (SAF) relative to the North American plate. We infer that the ash at the Boswell site (BW) is beyond the ash-fall limits of the Ibex Hollow Tuff, and it was transported by the ancestral Mississippi-Missouri River system to the Gulf of Mexico (see text). The approximate minimum areal distribution of the Ibex Hollow Tuff is enclosed by the solid line. Shown for comparison are the approximate minimum ash-fall distributions of the Huckleberry Ridge (ca. 2.10 Ma) and Lava Creek B (ca. 0.63 Ma) ash falls from these supereruptions (after Sarna-Wojcicki, 2000), shown by dotted and dashed lines, respectively.]()
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1-20 OF 55 RESULTS FOR
Trapper Creek Tuff
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1
Journal Article
Fallout tuffs of Trapper Creek, Idaho—A record of Miocene explosive volcanism in the Snake River Plain volcanic province Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 December 1995
GSA Bulletin (1995) 107 (12): 1484–1506.
...Michael E. Perkins; William P. Nash; Francis H. Brown; Robert J. Fleck Abstract A 900-m-thick section of tuffaceous sedimentary rock, vitric fallout tuff, and ash-flow tuff is well exposed along Trapper Creek in south-central Idaho. This section provides nearly continuous exposure through the fill...
Journal Article
Neogene tephra correlations in eastern Idaho and Wyoming: Implications for Yellowstone hotspot-related volcanism and tectonic activity Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 May 2009
GSA Bulletin (2009) 121 (5-6): 837–856.
... of Snake River Plain explosive volcanism has decreased by a factor of 2 or 3 since emplacement of the middle Miocene Trapper Creek tuffs likely underestimate post–Trapper Creek eruption rates. We have discovered a large number of previously unidentified post–middle Miocene major eruptive events, both...
FIGURES
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Image
Plot of CaO vs. Fe 2 O 3 (in oxide weight percent) for glass shards from t... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Figure 7. Plot of CaO vs. Fe 2 O 3 (in oxide weight percent) for glass shards from tephra layers of the Trapper Creek section, Idaho, including the Ibex Hollow Tuff within the section, and distal tephra layers correlated to the Ibex Hollow Tuff (see Fig. 1 for locations; see Fig. 2
Image
INSTRUMENTAL NEUTRON ACTIVATION ANALYSIS (INAA) OF VOLCANIC GLASSES OF TEPH... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
TABLE 3. INSTRUMENTAL NEUTRON ACTIVATION ANALYSIS (INAA) OF VOLCANIC GLASSES OF TEPHRA LAYERS: (A) TEPHRA LAYERS OF THE TRAPPER CREEK, IDAHO, SECTION CONTAINING THE IBEX HOLLOW TUFF; (B) THE IBEX HOLLOW TUFF AT TRAPPER CREEK, IDAHO, SITE TC, COMPARED TO DISTAL SAMPLES; (C) COMPARISON OF IBEX
Image
Plot of Sm vs. Dy for samples of the Trapper Creek section, Idaho, the Ibex... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Figure 9. Plot of Sm vs. Dy for samples of the Trapper Creek section, Idaho, the Ibex Hollow Tuff within the section, and the Ibex Hollow Tuff at distal sites (see Fig. 1 for locations and abbreviations; see Fig. 2 for stratigraphy of the Trapper Creek section). CPT—Cougar Point Tuff; INAA
Image
Plot of Hf vs. Eu for glass shards from tephra layers of the Trapper Creek ... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Figure 8. Plot of Hf vs. Eu for glass shards from tephra layers of the Trapper Creek section, Idaho, the proximal Ibex Hollow Tuff within this section, and the Ibex Hollow Tuff at distal sites (see Fig. 1 for locations and abbreviations; see Fig. 2 for stratigraphy of the Trapper Creek
Image
(A, B) Plots of rare earth element (REE) concentrations in glass shards for... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Figure 6. (A, B) Plots of rare earth element (REE) concentrations in glass shards for the Ibex Hollow Tuff (IHT) in the Trapper Creek, Idaho, section as ratios to those in a chondrite ( Boynton, 1992 ), where analyses were by instrumental neutron activation analysis (INAA) of glass shard
Image
(A, B) Plots of rare earth element (REE) concentrations in glass shards for... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Figure 6. (A, B) Plots of rare earth element (REE) concentrations in glass shards for the Ibex Hollow Tuff (IHT) in the Trapper Creek, Idaho, section as ratios to those in a chondrite ( Boynton, 1992 ), where analyses were by instrumental neutron activation analysis (INAA) of glass shard
Image
(A, B) Plots of rare earth element (REE) concentrations in glass shards for... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Figure 6. (A, B) Plots of rare earth element (REE) concentrations in glass shards for the Ibex Hollow Tuff (IHT) in the Trapper Creek, Idaho, section as ratios to those in a chondrite ( Boynton, 1992 ), where analyses were by instrumental neutron activation analysis (INAA) of glass shard
Image
(A, B) Plots of rare earth element (REE) concentrations in glass shards for... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Figure 6. (A, B) Plots of rare earth element (REE) concentrations in glass shards for the Ibex Hollow Tuff (IHT) in the Trapper Creek, Idaho, section as ratios to those in a chondrite ( Boynton, 1992 ), where analyses were by instrumental neutron activation analysis (INAA) of glass shard
Image
(A) ELECTRON-MICROPROBE ANALYSIS OF GLASS SHARDS FROM TEPHRA LAYERS, TRAPPE... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
TABLE 2. (A) ELECTRON-MICROPROBE ANALYSIS OF GLASS SHARDS FROM TEPHRA LAYERS, TRAPPER CREEK SECTION, IDAHO, INCLUDING IBEX HOLLOW TUFF (IHT; IN BOLD TYPE); (B) IBEX HOLLOW TUFF AND TEPHRA LAYERS AT DISTAL SITES CORRELATED WITH THE IBEX HOLLOW TUFF (SEE MAP, FIG. 1 )
Image
(A) ELECTRON-MICROPROBE ANALYSIS OF GLASS SHARDS FROM TEPHRA LAYERS, TRAPPE... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
TABLE 2. (A) ELECTRON-MICROPROBE ANALYSIS OF GLASS SHARDS FROM TEPHRA LAYERS, TRAPPER CREEK SECTION, IDAHO, INCLUDING IBEX HOLLOW TUFF (IHT; IN BOLD TYPE); (B) IBEX HOLLOW TUFF AND TEPHRA LAYERS AT DISTAL SITES CORRELATED WITH THE IBEX HOLLOW TUFF (SEE MAP, FIG. 1 )
Journal Article
Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico Open Access
Journal: Geosphere
Publisher: Geological Society of America
Published: 20 July 2023
Geosphere (2023) 19 (5): 1476–1507.
...Figure 7. Plot of CaO vs. Fe 2 O 3 (in oxide weight percent) for glass shards from tephra layers of the Trapper Creek section, Idaho, including the Ibex Hollow Tuff within the section, and distal tephra layers correlated to the Ibex Hollow Tuff (see Fig. 1 for locations; see Fig. 2...
FIGURES
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Image
Stratigraphic section at Trapper Creek, Idaho, showing the position of the ... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Figure 2. Stratigraphic section at Trapper Creek, Idaho, showing the position of the Ibex Hollow Tuff relative to other tephra layers within the composite Tuff of Ibex Peak, the relative thicknesses (meters) of the tephra layers, stratigraphic numbers assigned to each tephra layer (SN), 40 Ar
Image
Plot of Lu vs. Tb for samples of the Trapper Creek section, Idaho, the Ibex... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Figure 10. Plot of Lu vs. Tb for samples of the Trapper Creek section, Idaho, the Ibex Hollow Tuff within the section, and the Ibex Hollow Tuff at distal sites (see Fig. 1 for locations and abbreviations; see Fig. 2 for stratigraphy). CPT—Cougar Point Tuff; INAA—instrumental neutron
Image
Plots of concentrations of Fe 2 O 3 , Hf, Rb, and Th vs. age for glass shar... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Figure 5. Plots of concentrations of Fe 2 O 3 , Hf, Rb, and Th vs. age for glass shards from tephra layers at the Trapper Creek section, Idaho. Sequence of tuffs is from Table 6A . The positions of the Ibex Hollow Tuff (IHT), Cougar Point Tuff V (CPT V), and Cougar Point Tuff XIII (CPT XIII
Image
Correlation of the Ibex Hollow Tuff and underlying and overlying tuffs at s... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Ma Cougar Point Tuff (CPT) V ash bed, SN 18, at Trapper Creek, Idaho.
Image
![Map of western North America showing the volcanic fields of the Snake River Plain–Yellowstone hotspot and sampling sites of the Ibex Hollow Tuff. The source of the Ibex Hollow Tuff is the Bruneau-Jarbidge volcanic field (BJ; black) with older (Owyhee-Humboldt [OH]) and younger (Twin Falls [TF], Picabo [P], Heise [H], and Yellowstone Plateau [YP]) volcanic fields shown in gray (after Perkins et al., 1998). The Southern Nevada volcanic field (SNVF) is also shown in gray. Ibex Hollow Tuff locations are shown as black squares: Trapper Creek (TC, type locality of the Ibex Hollow Tuff), Hansel Valley (HV), Ambrose Road (AR), Glentana (G), Scobey (S), Ashfall Fossil Beds (AFB), Smith County (SC), Boswell (BW), Huntington Creek (HC), Stewart Valley (SV), Cobble Cuesta (CC), Aldrich Station (AS), Upper White Basin (UWB), El Paso basin (EPB), Deep Sea Drilling Project Site 173 (DSDP 173), and Naples Beach (NB; a.k.a. Dos Pueblos Beach). Black squares for NB and DSDP-173 are sites on the Pacific plate where, based on our calculations, deposition occurred at ca. 12 Ma. Open squares for NB and DSDP-173 indicate where these sites are today after right-lateral movement of the Pacific plate along the San Andreas fault system (SAF) relative to the North American plate. We infer that the ash at the Boswell site (BW) is beyond the ash-fall limits of the Ibex Hollow Tuff, and it was transported by the ancestral Mississippi-Missouri River system to the Gulf of Mexico (see text). The approximate minimum areal distribution of the Ibex Hollow Tuff is enclosed by the solid line. Shown for comparison are the approximate minimum ash-fall distributions of the Huckleberry Ridge (ca. 2.10 Ma) and Lava Creek B (ca. 0.63 Ma) ash falls from these supereruptions (after Sarna-Wojcicki, 2000), shown by dotted and dashed lines, respectively.](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/geosphere/19/5/10.1130_GES02593.1/4/s_ges02593_f01.png?Expires=2147483647&Signature=QH6NN1tXnVDfhFKDCHXxNvK2uLxoE2l0SEy-kYIGsMRS12tWqn2bKRAit-9AjtoOsq5Q-8TxZlpWkRgY9-Zlysh8TADlgQGgyiewGEvNwPweJ~qLFXP4iBVM27JZCmhov3seIr7Xmz944LaYDb2lfO~ahZeyABbutz5pIWcmW4kWutTUQsYSi65eycEW-s7yvSvuHvJR57wh~GG4KYYEfCylQD7oFRm5E8VzGXxlTXbZNSZxY-IhMckCfnoTAfkXV1y5PZgohyi8SporFQg28047KfcvvlBKdtPkJA960ub6wiXtlmf-3ndaX02KA2SRXsrbeXiHRa2DJO8MA8pnLw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Map of western North America showing the volcanic fields of the Snake River... Open Access
in Ibex Hollow Tuff from ca. 12 Ma supereruption, southern Idaho, identified across North America, eastern Pacific Ocean, and Gulf of Mexico
> Geosphere
Published: 20 July 2023
Falls [TF], Picabo [P], Heise [H], and Yellowstone Plateau [YP]) volcanic fields shown in gray (after Perkins et al., 1998 ). The Southern Nevada volcanic field (SNVF) is also shown in gray. Ibex Hollow Tuff locations are shown as black squares: Trapper Creek (TC, type locality of the Ibex Hollow Tuff
Journal Article
Mid-Miocene record of large-scale Snake River–type explosive volcanism and associated subsidence on the Yellowstone hotspot track: The Cassia Formation of Idaho, USA Open Access
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 July 2016
GSA Bulletin (2016) 128 (7-8): 1121–1146.
... Creek basin ( Fig. 1 ), and so it is a widespread, large-volume deposit; however, secondary thickening (reworking) precludes construction of meaningful isopachs. The ignimbrite is lithic-poor, intensely welded massive tuff. In the south (Trapper and Goose Creeks), the base is locally erosive...
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Journal Article
Paleobotanical evidence for the post-Miocene uplift of the Cascade Range Available to Purchase
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 09 July 2014
Canadian Journal of Earth Sciences (2014) 51 (8): 809–824.
... — Trapper Creek, ID, Late Miocene ( Axelrod 1964 ) Broadleaved hardwood and conifer forest Note: Vegetation types refer to the broadleaved deciduous forest of eastern North America and the xeric ecoregions of the Rocky Mountain area ( Thompson et al. 2008 ). The Cascade Range is divided...
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