Skip Nav Destination
Close Modal
![First thumbnail for: Marine turtles from the Late Cretaceous of <span c...]()
![Second thumbnail for: Marine turtles from the Late Cretaceous of <span c...]()
![Third thumbnail for: Marine turtles from the Late Cretaceous of <span c...]()
![Fig. 2.]()
![Fig. 2.]()
![Generalized outcrop belt of the Two Medicine Formation (TMF; green) in northwestern Montana, USA, the Judith River Formation (JRF) in central Montana, and the Belly River Group (BRG) in the plains of Alberta and Saskatchewan, Canada. Middle and upper portions of the Two Medicine Formation correlate with terrestrial and shallow-marine facies of the Judith River Formation and Belly River Group. Figure is modified from Eberth and Hamblin (1993) and Rogers et al. (2023). KC—Kennedy Coulee, north-central Montana; UMRBNM—Upper Missouri River Breaks National Monument, north-central Montana; Of—Onefour area, southeastern Alberta; DPP—Dinosaur Provincial Park, southeastern Alberta.]()
![Generalized outcrop belt of the Judith River Formation (JRF) in Montana and the Belly River Group (BRG) in the plains of Alberta and Saskatchewan, Canada. Upper portions of the Two Medicine Formation (TMF) represent the updip equivalent of the Judith River Formation in northwestern Montana. Focal areas include the expansive outcrops along the Missouri River in the Upper Missouri River Breaks National Monument (UMRBNM), exposures in the Milk River drainage in northern Montana (KC—Kennedy Coulee) and southeastern Alberta (Of—Onefour area), and exposures in the Red Deer River valley in Dinosaur Provincial Park (DPP). Figure is modified from Eberth and Hamblin (1993).]()
![First thumbnail for: Remarkable Preservation of Undigested Muscle Tissu...]()
![Second thumbnail for: Remarkable Preservation of Undigested Muscle Tissu...]()
![Third thumbnail for: Remarkable Preservation of Undigested Muscle Tissu...]()
![Location (a), stratigraphy (b), and simplified palaeogeographical model (c) of study area. Samples were taken from Dinosaur Provincial Park (DPP), Iddesleigh (ID), Onefour (O) and Manyberries (MB) in Alberta, and were derived from the Campanian Bearpaw and Dinosaur Park Formations. Study area represents a transect from freshwater fluvial conditions in the Dinosaur Park Formation, to open marine conditions in the Bearpaw Formation. All figures after Eberth (1996).]()
![Chronostratigraphic chart of Campanian strata in north-central Montana and southeastern Alberta (modified from Ramezani et al., 2022). The stratigraphy of recently published U-Pb zircon ages in the Judith River Formation, Bearpaw Formation, and Belly River Group (Ramezani et al., 2022) is indicated in relation to key units with black and red circles. The four ages specifically referenced in this study (Table 1) are indicated with red circles. The chronostratigraphy of the Pakowki, Claggett, Milk River, and Eagle Formations and the approximate duration of a hiatus in southeastern Alberta and north-central Montana are based on Payenberg et al. (2002, 2003). DPP—Dinosaur Provincial Park; Of—Onefour area, Alberta, Canada; KC—Kennedy Coulee; T-R—transgressive-regressive; Fm—Formation; Gp—Group; Mbrs—Members; Sst—Sandstone; CA-ID-TIMS—chemical abrasion–isotope dilution–thermal ionization mass spectrometry.]()
![Chronostratigraphic chart of Campanian strata in northwestern and north-central Montana, USA, and southeastern Alberta, Canada (modified from Ramezani et al., 2022; Rogers et al., 2023). The stratigraphy of recently published U-Pb zircon ages in the Two Medicine Formation, Judith River Formation, Bearpaw Formation, and Belly River Group is indicated in relation to key units with black circles (Ramezani et al., 2022). The stratigraphy of the six new U-Pb zircon ages reported in this study (Table 1) is indicated with red circles. The chronostratigraphy of the Pakowki, Claggett, Milk River, and Eagle Formations and the approximate durations of a hiatus in southeastern Alberta and north-central Montana are based on Payenberg et al. (2002, 2003). DPP—Dinosaur Provincial Park, southeastern Alberta; Of—Onefour area, southeastern Alberta; KC—Kennedy Coulee, north-central Montana; SU—subaerial unconformity; RCM—Rock City Member; FBM—Flag Butte Member; Fm—Formation; Mbr—Member; Gp—Group; Sst—Sandstone; SR—surrounding region, Two Medicine outcrop belt (see Fig. 3); CA-ID-TIMS—chemical abrasion–isotope dilution–thermal ionization mass spectrometry; T-R—transgression-regression.]()
![Fig. 1.]()
![Fig. 1.]()
![First thumbnail for: Age and growth in Myledaphus bipartitus , a Late C...]()
![Second thumbnail for: Age and growth in Myledaphus bipartitus , a Late C...]()
![Third thumbnail for: Age and growth in Myledaphus bipartitus , a Late C...]()
![First thumbnail for: The “Judith River–Belly River problem” revisited (...]()
![Second thumbnail for: The “Judith River–Belly River problem” revisited (...]()
![Third thumbnail for: The “Judith River–Belly River problem” revisited (...]()
![Stratigraphic model of Belly River Group proposed by Eberth and Hamblin (1993). (A) In this model, the Oldman–Dinosaur Park discontinuity is diachronous across its expanse, expressing up to 1.5 m.y. of diachroneity between Dinosaur Provincial Park (DPP) and the Onefour (Of) region in southern Alberta (legacy 40Ar/39Ar ages are from Eberth and Hamblin [1993], updated with 2σ errors). (B) Two distinct clastic lobes of alluvial nature fill the basin, with the Dinosaur Park lobe (DP lobe) sourced to the north, and the Oldman lobe (O lobe) sourced to the south. The diachronous discontinuity is interpreted to have developed at the intersection of the two alluvial lobes and is argued to maintain distinction across the region. The Omineca belt is identified as a source terrane for clastics in the basin and likely yielded the extraformational clasts in the Dinosaur Park Formation. (C) Over time, the Dinosaur Park lobe overtopped the Oldman lobe as it built southward and eastward into the basin. Both units are interpreted to have accumulated during R8 (Claggett regression) and T9 (Bearpaw transgression). Arrows in B and C indicate general paleocurrent directions. Figure is modified from Eberth and Hamblin (1993).]()
![First thumbnail for: Calibrating geologic strata, dinosaurs, and other ...]()
![Second thumbnail for: Calibrating geologic strata, dinosaurs, and other ...]()
![Third thumbnail for: Calibrating geologic strata, dinosaurs, and other ...]()
![First thumbnail for: Diagenetic effects on the oxygen isotope compositi...]()
![Second thumbnail for: Diagenetic effects on the oxygen isotope compositi...]()
![Third thumbnail for: Diagenetic effects on the oxygen isotope compositi...]()
![Subsurface expression of the Oldman–Dinosaur Park discontinuity (ODPD) and mid-Judith discontinuity (MJD) from the vicinity of Dinosaur Provincial Park (DPP) in southeastern Alberta to the Upper Missouri River Breaks National Monument (UMRBNM) in north-central Montana (path of subsurface section A–A′ indicated on map, wells 1–25). See text for descriptions of subsurface signatures that identify each discontinuity across the region. The red line in each log indicates the inferred position of each discontinuity (solid for Oldman–Dinosaur Park discontinuity, dashed for mid-Judith discontinuity). Both discontinuities maintain a relatively consistent stratigraphic position in relation to the Eagle/Milk River shoulder (EMRS), a widely recognized marker horizon (e.g., Glombick and Mumpy, 2014). Picks of Foremost-Oldman, Oldman–Dinosaur Park, and Dinosaur Park–Bearpaw contacts are informed by Glombick (2010a, 2010b, 2011a, 2011b, 2013). Picks of the Oldman–Dinosaur Park discontinuity that coincide with picks made by Glombick (2011b) in the same logs are indicated by black asterisks. Black dashed line on map indicates where Oldman–Dinosaur Park discontinuity to the north shifts to mid-Judith discontinuity to the south. Yellow—Oldman Formation; light green—Dinosaur Park Formation; light brown—Coal Ridge Member of Judith River Formation; darker brown—McClelland Ferry and Parkman Sandstone Members of Judith River Formation; dark gray—Bearpaw Formation. Judith River reference section 91-JRT-8 is from Rogers et al. (2016). KC—Kennedy Coulee field area; Of—Onefour field area; CF—Claggett Formation; BF—Bearpaw Formation; G—gamma-ray log; D—density log; R—resistivity log; S—sonic log; SP—spontaneous potential log.]()
![Subsurface expression of the Oldman–Dinosaur Park discontinuity (ODPD) and mid-Judith discontinuity (MJD) from the vicinity of Dinosaur Provincial Park (DPP) in southeastern Alberta to the Upper Missouri River Breaks National Monument (UMRBNM) in north-central Montana (path of subsurface section A–A′ indicated on map, wells 1–25). See text for descriptions of subsurface signatures that identify each discontinuity across the region. The red line in each log indicates the inferred position of each discontinuity (solid for Oldman–Dinosaur Park discontinuity, dashed for mid-Judith discontinuity). Both discontinuities maintain a relatively consistent stratigraphic position in relation to the Eagle/Milk River shoulder (EMRS), a widely recognized marker horizon (e.g., Glombick and Mumpy, 2014). Picks of Foremost-Oldman, Oldman–Dinosaur Park, and Dinosaur Park–Bearpaw contacts are informed by Glombick (2010a, 2010b, 2011a, 2011b, 2013). Picks of the Oldman–Dinosaur Park discontinuity that coincide with picks made by Glombick (2011b) in the same logs are indicated by black asterisks. Black dashed line on map indicates where Oldman–Dinosaur Park discontinuity to the north shifts to mid-Judith discontinuity to the south. Yellow—Oldman Formation; light green—Dinosaur Park Formation; light brown—Coal Ridge Member of Judith River Formation; darker brown—McClelland Ferry and Parkman Sandstone Members of Judith River Formation; dark gray—Bearpaw Formation. Judith River reference section 91-JRT-8 is from Rogers et al. (2016). KC—Kennedy Coulee field area; Of—Onefour field area; CF—Claggett Formation; BF—Bearpaw Formation; G—gamma-ray log; D—density log; R—resistivity log; S—sonic log; SP—spontaneous potential log.]()
![First thumbnail for: A new centrosaurine ceratopsid from the Oldman For...]()
![Second thumbnail for: A new centrosaurine ceratopsid from the Oldman For...]()
![Third thumbnail for: A new centrosaurine ceratopsid from the Oldman For...]()
1-20 OF 30 RESULTS FOR
Onefour Alberta
Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
1
Journal Article
Slope recession in the Onefour Badlands, Alberta, Canada: an initial appraisal of contrasted moisture regimes Free
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 01 February 1979
Canadian Journal of Earth Sciences (1979) 16 (2): 224–229.
...R. W. Barendregt; E. D. Ongley Abstract The initial 2 years (1975–1977) of a 10 year program of slope process measurement in the Onefour Badlands of Alberta, Canada, has encompassed two highly contrasted moisture regimes with measurable differences to process–response mechanisms. The Onefour...
Journal Article
Marine turtles from the Late Cretaceous of Alberta, Canada Available to Purchase
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 05 August 2015
Canadian Journal of Earth Sciences (2015) 52 (8): 581–589.
... tentatively referred to Lophochelys sp. from the Onefour mud-filled channel complex; and 3, stratigraphic position of postcranial specimen of marine turtle (TMP 2001.26.3) from the Manyberries area, southeastern Alberta. Modified from Brinkman et al. (2013 , fig. 10.1A), age estimates are from Eberth...
FIGURES
Image
Postcranial remains referred to Lophochelys sp. from the late Campanian o... Available to Purchase
Published: 05 August 2015
Fig. 2. Postcranial remains referred to Lophochelys sp. from the late Campanian of Alberta, Canada. (A) Partial carapace and plastron, TMP 1989.47.1, from the Bearpaw Formation, in dorsal (left) and ventral (right) views. (B–C) Isolated neurals from the Onefour mud-filled channel complex
Image
Surface relief maps of ( a ) Dinosaur Provincial Park and ( b ) Onefour stu... Available to Purchase
in Age and growth in Myledaphus bipartitus , a Late Cretaceous freshwater guitarfish from Alberta, Canada
> Canadian Journal of Earth Sciences
Published: 10 June 2013
Fig. 2. Surface relief maps of ( a ) Dinosaur Provincial Park and ( b ) Onefour study areas. Inset map of Canada highlights the Province of Alberta in dark grey. Study areas are shown as black rectangles. The legend in ( b ) applies to both maps. WGS, World Geodetic System.
Image
Generalized outcrop belt of the Two Medicine Formation (TMF; green) in nort... Available to Purchase
in Updating the Upper Cretaceous (Campanian) Two Medicine Formation of Montana: Lithostratigraphic revisions, new CA-ID-TIMS U-Pb ages, and a calibrated framework for dinosaur occurrences
> GSA Bulletin
Published: 17 July 2024
Montana; Of—Onefour area, southeastern Alberta; DPP—Dinosaur Provincial Park, southeastern Alberta.
Image
Generalized outcrop belt of the Judith River Formation (JRF) in Montana and... Available to Purchase
in The “Judith River–Belly River problem” revisited (Montana-Alberta-Saskatchewan): New perspectives on the correlation of Campanian dinosaur-bearing strata based on a revised stratigraphic model updated with CA-ID-TIMS U-Pb geochronology
> GSA Bulletin
Published: 28 July 2023
Montana. Focal areas include the expansive outcrops along the Missouri River in the Upper Missouri River Breaks National Monument (UMRBNM), exposures in the Milk River drainage in northern Montana (KC—Kennedy Coulee) and southeastern Alberta (Of—Onefour area), and exposures in the Red Deer River valley
Journal Article
Remarkable Preservation of Undigested Muscle Tissue Within a Late Cretaceous Tyrannosaurid Coprolite from Alberta, Canada Available to Purchase
Journal: PALAIOS
Publisher: SEPM Society for Sedimentary Geology
Published: 01 June 2003
PALAIOS (2003) 18 (3): 286–294.
... 98.102.7; Fig. 1 ) was discovered in situ near Onefour, Alberta, Canada, in the middle of the Campanian Lethbridge Coal Zone, a 20 meter-thick, transgressive succession that forms the top of the largely non-marine Dinosaur Park Formation in southern Alberta ( Eberth and Hamblin, 1993 ). The specimen...
FIGURES
Image
Location ( a ), stratigraphy ( b ), and simplified palaeogeographical model... Available to Purchase
in Diagenetic effects on the oxygen isotope composition of bones of dinosaurs and other vertebrates recovered from terrestrial and marine sediments
> Journal of the Geological Society
Published: 01 December 2003
Fig. 1. Location ( a ), stratigraphy ( b ), and simplified palaeogeographical model ( c ) of study area. Samples were taken from Dinosaur Provincial Park (DPP), Iddesleigh (ID), Onefour (O) and Manyberries (MB) in Alberta, and were derived from the Campanian Bearpaw and Dinosaur Park Formations
Image
Chronostratigraphic chart of Campanian strata in north-central Montana and ... Available to Purchase
in The “Judith River–Belly River problem” revisited (Montana-Alberta-Saskatchewan): New perspectives on the correlation of Campanian dinosaur-bearing strata based on a revised stratigraphic model updated with CA-ID-TIMS U-Pb geochronology
> GSA Bulletin
Published: 28 July 2023
in southeastern Alberta and north-central Montana are based on Payenberg et al. (2002 , 2003 ). DPP—Dinosaur Provincial Park; Of—Onefour area, Alberta, Canada; KC—Kennedy Coulee; T-R—transgressive-regressive; Fm—Formation; Gp—Group; Mbrs—Members; Sst—Sandstone; CA-ID-TIMS—chemical abrasion–isotope dilution
Image
Chronostratigraphic chart of Campanian strata in northwestern and north-cen... Available to Purchase
in Updating the Upper Cretaceous (Campanian) Two Medicine Formation of Montana: Lithostratigraphic revisions, new CA-ID-TIMS U-Pb ages, and a calibrated framework for dinosaur occurrences
> GSA Bulletin
Published: 17 July 2024
, Milk River, and Eagle Formations and the approximate durations of a hiatus in southeastern Alberta and north-central Montana are based on Payenberg et al. (2002 , 2003 ). DPP—Dinosaur Provincial Park, southeastern Alberta; Of—Onefour area, southeastern Alberta; KC—Kennedy Coulee, north-central
Image
Map of Alberta showing the distribution of the principal bonebed-hosting Up... Available to Purchase
in Origins of dinosaur bonebeds in the Cretaceous of Alberta, Canada
> Canadian Journal of Earth Sciences
Published: 05 August 2015
Fig. 1. Map of Alberta showing the distribution of the principal bonebed-hosting Upper Cretaceous geologic units (shaded areas) and bonebed producing areas (stars and numbers). Principal stratigraphic units include the Belly River Group (BRGp), Bearpaw Formation (BPFm), Scollard–Horseshoe Canyon
Image
Diagram showing the stratigraphic position of specimens described in this s... Available to Purchase
Published: 05 August 2015
of Kimurachelys slobodae and the specimens tentatively referred to Lophochelys sp. from the Onefour mud-filled channel complex; and 3, stratigraphic position of postcranial specimen of marine turtle (TMP 2001.26.3) from the Manyberries area, southeastern Alberta. Modified from Brinkman et al. (2013 , fig
Journal Article
Age and growth in Myledaphus bipartitus , a Late Cretaceous freshwater guitarfish from Alberta, Canada Available to Purchase
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 10 June 2013
Canadian Journal of Earth Sciences (2013) 50 (9): 930–944.
...Fig. 2. Surface relief maps of ( a ) Dinosaur Provincial Park and ( b ) Onefour study areas. Inset map of Canada highlights the Province of Alberta in dark grey. Study areas are shown as black rectangles. The legend in ( b ) applies to both maps. WGS, World Geodetic System. ...
FIGURES
Journal Article
The “Judith River–Belly River problem” revisited (Montana-Alberta-Saskatchewan): New perspectives on the correlation of Campanian dinosaur-bearing strata based on a revised stratigraphic model updated with CA-ID-TIMS U-Pb geochronology Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 28 July 2023
GSA Bulletin (2024) 136 (3-4): 1221–1237.
... Montana. Focal areas include the expansive outcrops along the Missouri River in the Upper Missouri River Breaks National Monument (UMRBNM), exposures in the Milk River drainage in northern Montana (KC—Kennedy Coulee) and southeastern Alberta (Of—Onefour area), and exposures in the Red Deer River valley...
FIGURES
Image
![Stratigraphic model of Belly River Group proposed by Eberth and Hamblin (1993). (A) In this model, the Oldman–Dinosaur Park discontinuity is diachronous across its expanse, expressing up to 1.5 m.y. of diachroneity between Dinosaur Provincial Park (DPP) and the Onefour (Of) region in southern Alberta (legacy 40Ar/39Ar ages are from Eberth and Hamblin [1993], updated with 2σ errors). (B) Two distinct clastic lobes of alluvial nature fill the basin, with the Dinosaur Park lobe (DP lobe) sourced to the north, and the Oldman lobe (O lobe) sourced to the south. The diachronous discontinuity is interpreted to have developed at the intersection of the two alluvial lobes and is argued to maintain distinction across the region. The Omineca belt is identified as a source terrane for clastics in the basin and likely yielded the extraformational clasts in the Dinosaur Park Formation. (C) Over time, the Dinosaur Park lobe overtopped the Oldman lobe as it built southward and eastward into the basin. Both units are interpreted to have accumulated during R8 (Claggett regression) and T9 (Bearpaw transgression). Arrows in B and C indicate general paleocurrent directions. Figure is modified from Eberth and Hamblin (1993).](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/gsabulletin/136/3-4/10.1130_B36999.1/2/s_b36999.1_f03.png?Expires=2147483647&Signature=EgkkbzOqluhPVlsCBpzaT2a7NSPbMmj6S4DnlAUqWI4xI~DrgPV1b2gO0FI9UeUUMxhtclPlCgfWQF8vH5iDZxOR-wshMLtj9AnT67b6IF5G-RznajouS~3QMvQj4iSKKdSvqZfCz4c2xKsskY0VRPUxQHWMNF4WTEy9PNKfyFnYDiLWqCVNtPZrGu4jSxOFm3gOuQMNcaH~S4FmVcFGWkH3VtENNIsBpcyMFE1jfOJFYulQRl6bKGR-jGuEr8o8dr4z1qhHnw8kpuRZGfLVuRzrzCmHhAdxDAyv484mWSZxhumTJYMghUfTfcKV0owlEIgIgTClZpMJwZd9FWjO9Q__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Stratigraphic model of Belly River Group proposed by Eberth and Hamblin (1... Available to Purchase
in The “Judith River–Belly River problem” revisited (Montana-Alberta-Saskatchewan): New perspectives on the correlation of Campanian dinosaur-bearing strata based on a revised stratigraphic model updated with CA-ID-TIMS U-Pb geochronology
> GSA Bulletin
Published: 28 July 2023
Figure 3. Stratigraphic model of Belly River Group proposed by Eberth and Hamblin (1993) . (A) In this model, the Oldman–Dinosaur Park discontinuity is diachronous across its expanse, expressing up to 1.5 m.y. of diachroneity between Dinosaur Provincial Park (DPP) and the Onefour (Of) region
Journal Article
Calibrating geologic strata, dinosaurs, and other fossils at Dinosaur Provincial Park (Alberta, Canada) using a new CA-ID-TIMS U–Pb geochronology Open Access
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 05 July 2023
Canadian Journal of Earth Sciences (2023) 60 (12): 1627–1646.
... a locality near Medicine Hat, and two other specimens were collected near Onefour in southeastern Alberta ( Campbell et al. 2019 ). Of particular interest is the ceratopsid Centrosaurus apertus, for which two distinct taphonomic modes occur: multiple (∼20) football-field-sized monodominant bonebeds...
FIGURES
Journal Article
Diagenetic effects on the oxygen isotope composition of bones of dinosaurs and other vertebrates recovered from terrestrial and marine sediments Available to Purchase
Journal: Journal of the Geological Society
Publisher: Geological Society of London
Published: 01 December 2003
Journal of the Geological Society (2003) 160 (6): 895–901.
...Fig. 1. Location ( a ), stratigraphy ( b ), and simplified palaeogeographical model ( c ) of study area. Samples were taken from Dinosaur Provincial Park (DPP), Iddesleigh (ID), Onefour (O) and Manyberries (MB) in Alberta, and were derived from the Campanian Bearpaw and Dinosaur Park Formations...
FIGURES
Image
Subsurface expression of the Oldman–Dinosaur Park discontinuity (ODPD) and ... Available to Purchase
in The “Judith River–Belly River problem” revisited (Montana-Alberta-Saskatchewan): New perspectives on the correlation of Campanian dinosaur-bearing strata based on a revised stratigraphic model updated with CA-ID-TIMS U-Pb geochronology
> GSA Bulletin
Published: 28 July 2023
Figure 7. Subsurface expression of the Oldman–Dinosaur Park discontinuity (ODPD) and mid-Judith discontinuity (MJD) from the vicinity of Dinosaur Provincial Park (DPP) in southeastern Alberta to the Upper Missouri River Breaks National Monument (UMRBNM) in north-central Montana (path
Image
Subsurface expression of the Oldman–Dinosaur Park discontinuity (ODPD) and ... Available to Purchase
in The “Judith River–Belly River problem” revisited (Montana-Alberta-Saskatchewan): New perspectives on the correlation of Campanian dinosaur-bearing strata based on a revised stratigraphic model updated with CA-ID-TIMS U-Pb geochronology
> GSA Bulletin
Published: 28 July 2023
Figure 7. Subsurface expression of the Oldman–Dinosaur Park discontinuity (ODPD) and mid-Judith discontinuity (MJD) from the vicinity of Dinosaur Provincial Park (DPP) in southeastern Alberta to the Upper Missouri River Breaks National Monument (UMRBNM) in north-central Montana (path
Journal Article
A new centrosaurine ceratopsid from the Oldman Formation of Alberta and its implications for centrosaurine taxonomy and systematics Available to Purchase
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 04 November 2005
Canadian Journal of Earth Sciences (2005) 42 (7): 1369–1387.
... shift in sediment deposition in the Alberta basin. Based on the age of the disconformity, the Dinosaur Park Formation sediments arrived in the Dinosaur Provincial Park region at ∼76.5 Ma ( Eberth and Deino 1992 ) and in the Onefour region of southern Alberta at ∼75.Ma ( Eberth et al. 1990 ). The rate...
FIGURES
1
