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Westwater Canyon Member

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Series: AAPG Studies in Geology
Published: 01 January 1986
DOI: 10.1306/St22455C6
EISBN: 9781629811475
... Abstract The Brushy Basin Member and the upper part of the Westwater Canyon Member of the Morrison Formation in northwest New Mexico are nonmarine sedimentary rocks of Late Jurassic age. This stratigraphic interval consists of as many as four lithofacies deposited in fluvial and playa-lake...
Series: SEPM Concepts in Sedimentology and Paleontology
Published: 01 January 1991
DOI: 10.2110/csp.91.03.0080
EISBN: 9781565762268
... Abstract The Westwater Canyon Member of the Morrison Formation (Upper Jurassic) has previously been interpreted as consisting of fluvial “channel systems” tens of kilometers wide and tens of meters thick. Reinvestigation of the member indicates that these “channel systems” actually represent...
Series: AAPG Studies in Geology
Published: 01 January 1986
DOI: 10.1306/St22455C5
EISBN: 9781629811475
... Abstract The Westwater Canyon Member of the Morrison Formation, the main ore-bearing sandstone in the San Juan basin, consists of a sequence of vertically stacked braided stream deposits. Three fluvial units within the sequence can be delineated in the basin. Volcanic pebbles are abundant...
Series: AAPG Studies in Geology
Published: 01 January 1986
DOI: 10.1306/St22455C8
EISBN: 9781629811475
... Abstract Approximately 1,800 geophysical logs and 100 measured sections provided data for several types of isopleth maps of the Westwater Canyon and Brushy Basin Members of the Upper Jurassic Morrison Formation in the southern San Juan basin, New Mexico. These types of maps include: isopach...
Series: AAPG Studies in Geology
Published: 01 January 1986
DOI: 10.1306/St22455C20
EISBN: 9781629811475
... Abstract A newly developed data-directed numerical method is used to estimate the undiscovered uranium endowment of the Westwater Canyon Member of the Morrison Formation in the San Juan basin, New Mexico. Data from 1,800 geophysical logs, chip samples from 40 test wells, and 40 measured surface...
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1981
AAPG Bulletin (1981) 65 (8): 1502.
...C. E. Turner-Peterson Abstract Three distinct fluvial packages can be recognized within the Westwater Canyon Member along the west side of the San Juan basin in New Mexico. Two of the fluvial packages (lower and upper) persist to the east and can be recognized as far east as Laguna. The middle...
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1979
AAPG Bulletin (1979) 63 (4): 694.
...A. E. Saucier Abstract Hematitic oxidation in the Westwater Canyon Member of the Morrison Formation extends along the outcrop from the Pipeline fault northeast of Gallup, New Mexico, to the San Mateo fault north of Grants, New Mexico. The hematitic sandstone forms a broad lobe in the subsurface...
Image
—Examples of architectural elements in <span class="search-highlight">Westwater</span> <span class="search-highlight">Canyon</span> <span class="search-highlight">Member</span> drawn withou...
Published: 01 June 1988
Figure 8 —Examples of architectural elements in Westwater Canyon Member drawn without vertical scale distortion and at same scale to indicate types of sand lithosome geometries present. Bounding surfaces are numbered according to rank. Unnumbered surfaces are of first and second order. Individual
Image
—Stratigraphic cross section showing relations of <span class="search-highlight">Westwater</span> <span class="search-highlight">Canyon</span> <span class="search-highlight">Member</span> t...
Published: 01 July 1976
Fig. 2. —Stratigraphic cross section showing relations of Westwater Canyon Member to enclosing rocks. This section is approximately transverse to paleocurrent directions and shows cross-sectional dimensions of channel systems that compose continuous sheet of Westwater Canyon sandstone.
Series: AAPG Studies in Geology
Published: 01 January 1986
DOI: 10.1306/St22455C18
EISBN: 9781629811475
... Abstract Petrographic study of the Mariano Lake-Lake Valley cores reveals three distinct zones of postdepositional alteration of detrital Fe-Ti (iron-titanium) oxide minerals in the Westwater Canyon Member of the Upper Jurassic Morrison Formation. In the uranium-bearing and adjacent portions...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1985
AAPG Bulletin (1985) 69 (5): 852–853.
...Allan R. Kirk; Steven M. Condon ABSTRACT Structures that were active in the Jurassic, inferred from isopleth and structure contour maps, significantly affected depositional patterns in the Westwater Canyon Member of the Morrison Formation in the southern San Juan basin, northwestern New Mexico...
Series: AAPG Studies in Geology
Published: 01 January 1986
DOI: 10.1306/St22455C17
EISBN: 9781629811475
... Abstract Early diagenesis in the Morrison Formation resulted in the formation of the world’s largest sandstone-hosted uranium deposits. Distribution of diagenetic alterations in ore-bearing sandstones of the Westwater Canyon Member suggests that these alterations were strongly influenced...
Series: AAPG Studies in Geology
Published: 01 January 1986
DOI: 10.1306/St22455C9
EISBN: 9781629811475
... faulting defined by northwest- and northeast-trending high-angle normal faults with major periods of movement occurring in the Late Permian and Late Jurassic. The seismic survey, combined with detailed subsurface stratigraphic studies, shows that thickness and sand content of the Westwater Canyon Member...
Series: AAPG Studies in Geology
Published: 01 January 1986
DOI: 10.1306/St22455C14
EISBN: 9781629811475
... the basal part of the Dakota Sandstone, the Brushy Basin and Westwater Canyon Members of the Morrison Formation, and the upper part of the Recapture Member of the Morrison Formation. The project objectives were (1) to provide cores and geophysical logs for study of the sedimentology, petrography...
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1979
AAPG Bulletin (1979) 63 (4): 690.
...T. E. Kelly; R. L. Link; M. R. Schipper Abstract The principal ore-bearing zone in the Ambrosia Lake area of the Grants uranium district is the Westwater Canyon Member of the Morrison Formation of Jurasic age. This is also one of the major artesian aquifers in the region. Significant declines...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1951
AAPG Bulletin (1951) 35 (5): 1108–1109.
... beds, considered to be Salt Wash, are present. The upper part of the Morrison formation likewise consists of two lithologic members—the Brushy Basin shale member and the Westwater Canyon sandstone member. The Brushy Basin member is present over all the Colorado Plateau except for a belt extending from...
Journal Article
Journal: AAPG Bulletin
Published: 01 July 1984
AAPG Bulletin (1984) 68 (7): 937.
...Neil S. Fishman; Christine E. Turner-Peterson; Richard L. Reynolds ABSTRACT Petrographic studies of outcrop and drill core samples in the Westwater Canyon Member of the Morrison Formation along the southern and western margins of the San Juan basin reveal a close spatial relationship among altered...
Series: AAPG Studies in Geology
Published: 01 January 1986
DOI: 10.1306/St22455C19
EISBN: 9781629811475
... toward the basin margin, giving rise to mineral zonation within the sandstone over a lateral distance of approximately 35 km. The observed patterns include: (1) Pure smectite occurs as grain coatings in the Westwater Canyon Member in the shallowest core; this smectite is texturally similar to mixed...
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1979
AAPG Bulletin (1979) 63 (4): 689.
...W. E. Galloway Abstract The Westwater Canyon Member is one of several large, low-gradient alluvial fans that comprise the Morrison Formation in the Four Corners area. Morrison fans were deposited by major laterally migrating streams entering a broad basin bounded by highlands on the west and south...
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1979
AAPG Bulletin (1979) 63 (4): 691.
...B. A. Livingston Abstract Uranium deposition in the Marquez, New Mexico, area occurs almost exclusively in the lower Westwater Canyon Member of the Morrison Formation of Jurassic age. The average aggregate thickness of the Westwater is 90 m but ranges from a minimum of 73 m to a maximum of 100 m...