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Tidwell Member

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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 01 April 2016
Lithosphere (2016) 8 (2): 185–193.
... Formation, and Tidwell and Salt Wash Members of the Morrison Formation. Detrital zircon geochronology results show a marked increase in ca. 523 Ma grains (compared to most Mesozoic sediments on the Colorado Plateau) that begins abruptly in the Wanakah Formation and continues into the basal Marker Bed...
FIGURES | View All (6)
Journal Article
Journal: Geosphere
Published: 21 July 2021
Geosphere (2021) 17 (5): 1494–1516.
...-continent, Grenville, Appalachian, and peri-Gondwanan terranes). Ca. 540–500 Ma zircon grains are anomalously abundant locally in the uppermost Entrada Sandstone and Wanakah Formation but are either lacking or present in small fractions in the overlying Salt Wash and Tidwell Members of the Morrison...
FIGURES | View All (13)
Journal Article
Journal: Geology
Published: 01 December 1987
Geology (1987) 15 (12): 1138–1142.
... and not Jurassic. These are not necessarily mutually exclusive, and it may be that a combination of these factors is true for our section. The long-term sediment accumulation rate calculated from the fission-track dates for the lower Brushy Basin, Salt Wash, and Tidwell Members of the Morrison Formation is about...
Image
Age populations as distributed in major age categories as defined by  Dicki...
Published: 01 April 2016
Bed A of the Tidwell Member). This suggests an unroofing sequence as well as a conformable contact between the Wanakah Formation and the Tidwell Member.
Image
Stratigraphy of western Colorado and Escalante Canyon study site. Black das...
Published: 01 April 2016
Sandstone); 2—Jeef (sample located above the scour surface and interpreted herein as basal Wanakah Formation); 3—2Jw (Wanakah Formation); 4—3Jw (Wanakah Formation); 5—1Jmt (Marker Bed A of the Tidwell Member); 6—2Jmt (Tidwell Member). Overlying Salt Wash Member sample location is not shown. Ss—sandstone.
Image
Figure 2. Jurassic stratigraphic units, indicating Navajo Sandstone study i...
Published: 01 April 2001
Figure 2. Jurassic stratigraphic units, indicating Navajo Sandstone study interval. Note that Tidwell Member includes undifferentiated Summerville Formation at some localities ( Doelling, 1993 )
Image
A comparison of the sequence stratigraphic scheme presented in this study w...
Published: 29 October 2019
Fig. 13.— A comparison of the sequence stratigraphic scheme presented in this study with units identified in previous works. Turner-Peterson (1986) and others: see text for a full list of references. Lithostrat, lithostratigraphy; Seq, sequence; Tid, Tidwell Member.
Image
Correlation of measured stratigraphic sections of outcrops at study sites (...
Published: 21 July 2021
Sandstone; w—Wanakah Formation; mt, sw—Tidwell and Salt Wash Members of the Morrison Formation; ms—Salt Wash Member of the Morrison formation; eef—Wanakah Formation. The wavy line in column A between the Summerville Formation and the Tidwell Member of the Morrison Formation at Ten Mile Graben represents
Image
Jurassic units in the Moab, Utah area. J-2 indicates the unconformity at th...
Published: 01 September 2000
Figure 3 Jurassic units in the Moab, Utah area. J-2 indicates the unconformity at the top of the Navajo Sandstone and base of the Page Sandstone ( Pipiringos and O'Sullivan, 1978 ). The J-5 ( Pipiringos and O'Sullivan, 1978 ) is at the base of the Tidwell member of the Morrison Formation
Image
View looking northeast across Green River at Little Grand Wash fault zone. ...
Published: 15 August 2019
= Curtis Formation; Jmb = Brushy Basin Member, Morrison Formation; Jms = Salt Wash Member, Morrison Formation; Jsmt = Tidwell Member, Morrison Formation, and Summerville Formation; Km = Mancos Shale; Qa = Quaternary (undifferentiated).
Image
A) Late Jurassic–Early Cretaceous lithostratigraphy of Western Canada and t...
Published: 01 June 2013
Figure 1 A) Late Jurassic–Early Cretaceous lithostratigraphy of Western Canada and the USA. BH. = Buckhorn conglomerate, BB. = Brushy Basin Member, ST. = Saltwash Member, T. = Tidwell Member, SC. = Summerville and Curtis formations, E. = Entrada sandstone, CM. = Carmel Formation, P. = Page
Series: SEPM Special Publication
Published: 01 January 2013
EISBN: 9781565763036
... deposited basinward below an intersection point for some period of time. Three rock record examples appear to be consistent with the hypothesized prograding DFS signal. The Blue Mesa and Sonsela members of the Chinle Formation at Petrified Forest National Park, Arizona; the Tidwell and Salt Wash members...
FIGURES | View All (10)
Series: GSA Field Guide
Published: 01 January 2005
DOI: 10.1130/2005.fld006(16)
EISBN: 9780813756066
... (from Dunagan and Turner, 2004 ) of exposure showing zeolite zones within altered tuffs. Stop 3.3: Tidwell Member of the Morrison Formation along the Fremont River Figure 12. Coal bed in the lower part of the Monitor Butte Member of the Chinle Formation in Blue Notch Canyon, Glen...
FIGURES | View All (26)
Image
Paleogeographic maps of the Middle and early Late Jurassic showing major re...
Published: 21 July 2021
of the lower Morrison Formation (Tidwell Member) and the fluvial systems of the Salt Wash megafan (upper Morrison) and correlative strata that evolved during the Late Jurassic deposition in southwestern Laurentia. Paleogeographic maps are modified after Peterson (1994) , Dickinson and Gehrels (2010
Image
Paleogeographic maps of the Middle and early Late Jurassic showing major re...
Published: 21 July 2021
of the lower Morrison Formation (Tidwell Member) and the fluvial systems of the Salt Wash megafan (upper Morrison) and correlative strata that evolved during the Late Jurassic deposition in southwestern Laurentia. Paleogeographic maps are modified after Peterson (1994) , Dickinson and Gehrels (2010
Journal Article
Journal: AAPG Bulletin
Published: 01 August 2008
AAPG Bulletin (2008) 92 (8): 1055–1076.
.... This facies occurs throughout the Salt Wash Member and in parts of the Brushy Basin and Tidwell members, but the distribution and abundance vary with channel type and stratigraphic position. Pebbly sandstones overlie scour surfaces at the base of channels and at the base of macroforms within channel...
FIGURES | View All (8)
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FIGURE 2. General stratigraphy of the Morrison Formation in the vicinity of...
Published: 01 May 2011
of the Morrison Formation are the Tidwell, Salt Wash and Brushy Basin members. The lower portions of the Brushy Basin Member interfinger with and are more closely associated with the Salt Wash Member sandstones. Cross-bedded coarse sandstones near the top of the lower Brushy Basin are similar to the cross-bedded
Image
—Representative measured section of the <span class="search-highlight">Tidwell</span>, Salt Wash, and Brushy Basi...
Published: 01 August 1997
Figure 3 —Representative measured section of the Tidwell, Salt Wash, and Brushy Basin members of the Morrison Formation at Saleratus Point, Garfield County, Utah. Location of section is shown as SP on Figure 5 .
Journal Article
Published: 29 October 2019
Journal of Sedimentary Research (2019) 89 (10): 1017–1038.
...Fig. 13.— A comparison of the sequence stratigraphic scheme presented in this study with units identified in previous works. Turner-Peterson (1986) and others: see text for a full list of references. Lithostrat, lithostratigraphy; Seq, sequence; Tid, Tidwell Member. ...
FIGURES | View All (13)
Image
Illustrations of selected facies from the <span class="search-highlight">Tidwell</span> and Salt Wash <span class="search-highlight">members</span>. (A...
Published: 01 August 2008
Figure 3 Illustrations of selected facies from the Tidwell and Salt Wash members. (A) Channel scour surface on laminated mudstones (facies Mlam) overlain by pebbly sandstone (facies Pbs). The picture shows an approximately 1-m (3-ft)-thick interval. (B) Plane-parallel-stratified sandstone (facies