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Las Animas Arch

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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1946
AAPG Bulletin (1946) 30 (10): 1756–1763.
...John C. Maher ABSTRACT The Skelly Oil Company’s Hankins well No. 1 in southeastern Baca County, Colorado, low on the southeast flank of the Las Animas arch, penetrated a sequence of Paleozoic rocks about 5,500 feet thick, before being abandoned at a depth of 6,171 feet in the Arbuckle limestone...
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1967
AAPG Bulletin (1967) 51 (8): 1687.
...Joseph R. Clair; Richard W. Volk ABSTRACT Drilling on the Las Animas arch during the past 3 years has provided the control for a more complex structural theory of development than has been considered previously. Pre-Pennsylvanian folding has a predominantly northwest-southeast trend, whereas...
Journal Article
Journal: AAPG Bulletin
Published: 01 September 1966
AAPG Bulletin (1966) 50 (9): 2033–2034.
...Joseph R. Clair; Richard W. Volk ABSTRACT The Las Animas arch has been the site of intermittent exploration during nearly 40 years but still is virtually untouched. Despite two recent, significant discoveries, the arch is a “cold area.” The writers believe that this is the result of a lack...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1952
AAPG Bulletin (1952) 36 (5): 966.
...B. F. Curtis; J. H. Goth ABSTRACT A complex anticlinal flexure about 70 miles wide extends northeastward from central Bent County into Kit Carson County, Colorado. This fold, called the Las Animas arch, appears on structural maps of post-Permian beds to be the north-plunging nose of the Sierra...
Journal Article
Journal: AAPG Bulletin
Published: 01 November 1945
AAPG Bulletin (1945) 29 (11): 1654–1667.
... American Association of Petroleum Geologists The Las Animas arch, also known as the Sierra Grande arch, 3 is a major structural feature trending northeastward across eastern Colorado and northeastern New Mexico. It is well defined in the exposed Cretaceous formations in Colorado 4 as shown...
FIGURES
Image
Stratigraphy of the <span class="search-highlight">Las</span> <span class="search-highlight">Animas</span> <span class="search-highlight">arch</span> area modified from  Merewether (1987) ....
Published: 29 June 2021
Figure 2. Stratigraphy of the Las Animas arch area modified from Merewether (1987) . Key horizons mapped on Figure  3 are noted with unit abbreviations in circles. Approximate periods of major orogenic events are shaded and labeled. Cr., creek; Dol., dolomite; Fm., formation; Ls, limestone; Ss
Journal Article
Journal: AAPG Bulletin
Published: 01 June 1957
AAPG Bulletin (1957) 41 (6): 1251–1262.
... by increased activity along the Las Animas arch and in western Colorado. Total geophysical activity increased markedly over 1955, with most of the increase attributed to southeastern and western Colorado. The majority of discoveries in western Nebraska and Colorado were again concentrated in the Cretaceous...
FIGURES
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1950
AAPG Bulletin (1950) 34 (3): 623.
... are the Sierra Grande uplift and the so-called Las Animas arch, plus the territory north and northeast toward the northeast corner of the state. The Apishapa uplift, connecting the Sierra Grande uplift with the Wet Mountains, and separating the Denver and Raton basins, has been included in this area of Paleozoic...
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1983
AAPG Bulletin (1983) 67 (8): 1324.
... to have affected locally the bathymetry or paleotopography in the vicinity of the Las Animas arch. As a result, lithofacies distribution of either clastic or carbonate rock is related to proximity to the shear zones. Surface lineations derived from Landsat analysis, coupled with lithofacies mapping based...
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1972
AAPG Bulletin (1972) 56 (3): 660.
...R. W. Volk Abstract Throughout Permian time, eastern Colorado, like western Kansas, was on the shelf area of the Anadarko basin; and the Las Animas arch, as reflected on top of the pre-Pennsylvanian unconformity, was a south-trending nose in the north part of the Anadarko basin. This relation...
Journal Article
Journal: AAPG Bulletin
Published: 01 January 1960
AAPG Bulletin (1960) 44 (1): 125–126.
... was normal shallow marine. Definition of the Las Animas arch throughout Permian and Pennsylvanian time was slight, and this feature did not achieve regional prominence until Cretaceous time. By middle Permian time the Sierra Grande-Apishapa uplift had been completely inundated by Permian seas. Deposition...
Journal Article
Journal: AAPG Bulletin
Published: 01 June 1960
AAPG Bulletin (1960) 44 (6): 879–890.
... continued along the Las Animas arch in southeastern Colorado where two more successful offsets to the McClave Morrow gas field and a Morrow oil discovery inspired new vigor in the search for oil and gas in that area. Western Colorado had the best statistical year in its history, with 102 exploratory tests...
FIGURES
Journal Article
Journal: AAPG Bulletin
Published: 01 November 1953
AAPG Bulletin (1953) 37 (11): 2613.
...John C. Maher ABSTRACT The structural backbone of southeastern Colorado is formed by the Front Range, the Wet Mountains, and a buried ridge, the Apishapa-Sierra Grande uplift, which extends southeastward from the Wet Mountains. The Las Animas arch, of later origin, plunges off this buried ridge...
Journal Article
Journal: AAPG Bulletin
Published: 01 October 1984
AAPG Bulletin (1984) 68 (10): 1330–1332.
... of 31.0%. The majority of the activity was in the Denver basin and Las Animas arch area of eastern Colorado. In this area, the significant 1983 exploration discoveries extend Paleozoic production from the Las Animas arch into the Denver basin and established new areas of shallower Cretaceous production...
FIGURES
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1983
AAPG Bulletin (1983) 67 (8): 1342.
... by incorporating the activated carbon/Curie point wire collector in gas geochemical surveys of faulted and fractured structures which serve as conduits to the subsurface. Studies conducted in the Denver-Julesburg basin of Colorado, Green River basin of Wyoming, the hingeline of Utah, and the Las Animas arch...
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1971
AAPG Bulletin (1971) 55 (3): 544.
...Richard W. Volk ABSTRACT Through Permian time eastern Colorado was geologically in the northwestern part of the Anadarko basin. The Denver basin and the Las Animas arch are the major geologic features in this area, and both of these attained their present structural configuration during...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1953
AAPG Bulletin (1953) 37 (5): 913–939.
...John C. Maher ABSTRACT The structural backbone of southeastern Colorado is formed by the Front Range, the Wet Mountains, and a buried ridge, the Apishapa-Sierra Grande uplift, which extends southeastward from the Wet Mountains. The Las Animas arch, of later origin, plunges off this buried ridge...
FIGURES | View All (22)
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1952
AAPG Bulletin (1952) 36 (8): 1675–1676.
...-Sierra Grande uplift, extending southeastward from the Wet Mountains. The Las Animas arch, of later origin, plunges off this buried ridge to the northeast. Parts of three major structural basins are present in the area—the Hugoton embayment of the Anadarko basin, the Denver basin, and the Raton basin...
Journal Article
Journal: AAPG Bulletin
Published: 01 November 1964
AAPG Bulletin (1964) 48 (11): 1875.
...Elmer H. Baltz ABSTRACT RATON BASIN The Raton basin of northeastern New Mexico and southeastern Colorado is a Laramide structural basin bounded on the west by the Sangre de Cristo uplift, on the north by the Wet Mountains uplift and Apishapa arch and on the east by the Sierra Grande and Las Animas...
Journal Article
Journal: AAPG Bulletin
Published: 01 September 1967
AAPG Bulletin (1967) 51 (9): 1901–1902.
... this hypothesis. Late Meramecian carbonate rocks in western Kansas contain abundant quartzose clastics thought to be derived from the Central Kansas uplift and Las Animas arch. In the Williston basin, Mississippian rocks are dominantly carbonates but in Late Mississippian time thick evaporites were deposited...