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Hopi Sandy Member

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..., Hopi Sandy Member, and upper shale member, of which only the Hopi Sandy Member is formally described. In addition, a prominent sandstone tongue of the overlying Toreva Formation at Blue Point in southwestern Black Mesa is herein designated the Blue Point Tongue of the Toreva Formation. Based...
Journal Article
Journal: AAPG Bulletin
Published: 01 February 1956
AAPG Bulletin (1956) 40 (2): 255–294.
... to have been an offshore deposit around the peninsula of sand now considered to be a part of the Toreva formation of the Mesaverde group on Black Mesa. In appearance the Juana Lopez member is very similar to the sandy, cliff-forming beds in the middle of the Collignoniceras woollgari zone of Black Mesa...
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Journal Article
Journal: AAPG Bulletin
Published: 01 August 1954
AAPG Bulletin (1954) 38 (8): 1827–1834.
... bentonitic shale and minor sand, locally cross-bedded, with fragments of petrified wood, large (3 feet) dark brown ironstone concretions, underlain by black, green, and yellow shale. Dip 10° NE. (Allen’s upper member of Tohatchi formation) Beds probably assignable to the Deza formation are exposed...
FIGURES
Journal Article
Journal: AAPG Bulletin
Published: 01 November 1965
AAPG Bulletin (1965) 49 (11): 1997–2019.
... Formation .—The Elbert Formation has been subdivided into the lower McCracken Sandstone and the “upper Elbert” member. The McCracken is predominantly fine- to medium-grained, light gray to red, poorly sorted, glauconitic sandstone with thin stringers of sandy dolomite. A source of clastic material existed...
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Journal Article
Journal: AAPG Bulletin
Published: 01 February 2023
AAPG Bulletin (2023) 107 (2): 191–212.
.... Crawford and Wallace, 1993 ), (7) soil, (8) unconsolidated sandy or gravelly stream alluvium, or (9) siliciclastic shale and sandstone from the Lamar Limestone Member and deeper sandstone portions of the Bell Canyon Formation of the Delaware Mountain Group. Confidently distinguishing brecciated versus...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1968
AAPG Bulletin (1968) 52 (10): 2045–2057.
... is sandy, red to brown shale. The upper 75 ft is a medium- to coarse-grained, tan to gray sandstone, quartzitic in part, having a few beds of dense, buff to reddish-brown dolomite. The contact of the McCracken with the upper dolomite member of the Elbert is gradational. Total thickness of the upper Elbert...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1960
AAPG Bulletin (1960) 44 (1): 21–36.
... be expected to cause compaction folds in overlying rocks. In spite of differences in nomenclature, Cambrian rocks are essentially similar over the entire region: basal clastic rocks are overlain by limestone and dolomite, all units become younger and more sandy toward the east and south, and clastic...
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Journal Article
Journal: Geosphere
Published: 21 June 2021
Geosphere (2021) 17 (4): 987–1006.
... or relative) for the equal-size (1 + 1 cm) end member on the left and the 1 + 5 cm unequal size end member on the right ( Fig. 13 ). Note that the van der Plas and Tobi (1965) charts were using 2σ precision instead, representing only the counting error, because they assumed a homogeneous material...
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Journal Article
Journal: Geosphere
Published: 08 May 2019
Geosphere (2019) 15 (4): 1128–1139.
... of two prominent sandstone units separated by a predominately siltstone unit. The Sonsela Sandstone bed has been correlated to a number of specific sandstones within the thicker, formal Sonsela Member at Petrified Forest National Park in northern Arizona. Here, we present the first detrital U-Pb zircon...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1961
AAPG Bulletin (1961) 45 (1): 1–38.
... sandstones in the upper part of the section. The upper, sandy part of the Chinle is now included as a member (Red Point) of the overlying Wingate sandstone ( Harshbarger, Repenning, and Irwin, 1957 ). The Chinle forms a steep slope everywhere between the dip slopes and ledges of the underlying Shinarump...
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Journal Article
Journal: AAPG Bulletin
Published: 01 September 2021
AAPG Bulletin (2021) 105 (9): 1765–1777.
... Shale. Fm. = Formation; Mbr = Member; Ss = Sandstone. The San Juan Basin is a structurally asymmetric basin ( Figure 2 ). It is bounded on its western, northern, and eastern flanks by steeply dipping monoclines. To the southeast, a high-angle reverse fault of late Paleogene age separates...
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Journal Article
Journal: Geology
Published: 01 October 2001
Geology (2001) 29 (10): 935–938.
... degassing and atmospheric loading by the Roza eruption, Columbia River Basalt Group, Washington, USA : Journal of Volcanology and Geothermal Research , v. 74 p. 49 – 73 . Thordarson , T. , and Self , S. , 1998 , The Roza Member, Columbia River Basalt Group; a gigantic pahoehoe lava flow...
FIGURES
Journal Article
Published: 01 December 1997
Bulletin of Canadian Petroleum Geology (1997) 45 (4): 577–594.
... comprise whole members without the presence of the first type of siltstone. Burrowed siltstone is commonly calcareous, pyritic and may contain micronodules of barite. Rarely, thin-walled shelly fragments are preserved. Some sandy siltstones, grading into silty sandstones, are present, especially...
Journal Article
Journal: Geology
Published: 06 May 2022
Geology (2022) 50 (8): 939–943.
... ) for dark sandy layers (see Methods in the Supplemental Material). This examination yielded 31 examples of dark strata with submeter thickness above dark slopes with characteristics of gravitational sand deposition ( Figs. 4A – 4C ; Supplemental Dataset 2; see the supplemental Methods). An olivine-rich...
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Journal Article
Journal: GSA Bulletin
Published: 01 November 2011
GSA Bulletin (2011) 123 (11-12): 2160–2176.
... on surface water for agriculture and grazing have been affected by arroyo cutting and changing planform channel geometry for millennia. Examples of this from the American Southwest include ancestral Puebloan migration to loci of channel aggradation at McElmo Canyon ( Force, 2004 ), migration of Hopi...
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Journal Article
Journal: Geosphere
Published: 21 April 2021
Geosphere (2021) 17 (3): 854–875.
... Sandstone sensu Baltz (1967) , i.e., at the base of the Kimbeto Member of the Ojo Alamo Sandstone sensu Powell (1973) and Cather et al. (2019) . We use that position throughout this paper and note that the exact position of the boundary does not affect our interpretations of basin sedimentary...
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Journal Article
Journal: GSA Bulletin
Published: 01 December 2002
GSA Bulletin (2002) 114 (12): 1535–1549.
... ). Imbrication is common in the conglomerate where clast shapes are appropriate to show it, but in most cases the sphericity of the clasts precludes imbrication. The conglomerate ranges from well sorted to poorly sorted and is generally clast supported with a sandy matrix. It is poorly structured or massive...
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Journal Article
Journal: Geosphere
Published: 01 December 2015
Geosphere (2015) 11 (6): 1719–1748.
....—Pleistocene; Congl. Mbr—conglomerate member; MT—mountain; GP—Group; FM—Formation; Lyc.—Lycium member; Ocot.—Ocotillo Formation; W.C.—Wind Caves member; L.F.—local fauna; Eleph. Trees—Elephant Trees Formation; u.m.—Upper megabreccia; Cam—Camels Head member. CORRESPONDENCE: dkimbrough@mail.sdsu.edu...
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Journal Article
Published: 24 June 2003
Canadian Journal of Earth Sciences (2003) 40 (7): 983–993.
...Alison M. Murray; Lisa A. Budney Abstract Several specimens of a fossil catfish, collected from the Eocene Mahenge site of Tanzania, are identified as a member of Chrysichthys (Claroteidae) based on several features, including long, thick pectoral and dorsal spines and the presence of nasal barbels...
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Journal Article
Journal: GSA Bulletin
Published: 01 January 2008
GSA Bulletin (2008) 120 (1-2): 13–33.
... on the central plateau. Understanding the timing and genesis of the Chuska Sandstone thus is crucial to the interpretation of the stratigraphic and paleogeomorphic development of the Colorado Plateau. The Chuska Sandstone consists of a basal fluvial unit 0–81 m thick (the Deza Member) that is transitionally...
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