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northeastern Montana

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Series: GSA Special Papers
Published: 01 January 2014
DOI: 10.1130/2014.2503(12)
... Here we provide a survey of Triceratops localities and accompanying stratigraphic data from the Hell Creek Formation of northeastern Montana. The majority of the sites discussed here were relocated or discovered during the last 5 yr of the Hell Creek Project (1999–2010), a multi-institutional...
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—Map showing general features of <b>northeastern</b> <b>Montana</b>. Area described is wi...
Published: 01 August 1941
FIG. 4. —Map showing general features of northeastern Montana. Area described is within dotted line.
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—Generalized section across <b>northeastern</b> <b>Montana</b> into northwestern North Da...
Published: 01 August 1941
FIG. 5. —Generalized section across northeastern Montana into northwestern North Dakota. Line of section is shown in Figure 4 .
Series: GSA Special Papers
Published: 01 January 2014
DOI: 10.1130/2014.2503(14)
...), a Triceratops bonebed in the Hell Creek Formation, Garfield County, Montana. Using site taphonomic descriptions with an evaluation of ontogeny, inferences regarding the paleobiology of this extinct taxon are possible. The locality is associated with abundant organic material, including woody debris, large...
Series: GSA Special Papers
Published: 01 January 2014
DOI: 10.1130/2014.2503(04)
... Magnetostratigraphic evaluation of a well-exposed stratigraphic section in northeastern Montana has been undertaken to expand upon and better understand the timing of the Hell Creek and Fort Union Formations and the biological processes recorded within them. Characteristic remanent...
Series: GSA Special Papers
Published: 01 January 2014
DOI: 10.1130/2014.2503(10)
...., acid rain). We quantitatively analyzed high-resolution temporal changes in diversity and community structure of a succession of salamander and salamander-like lissamphibian assemblages from the Hell Creek Formation and Tullock Member of the Fort Union Formation of Garfield County, northeastern Montana...
Series: GSA Special Papers
Published: 01 January 2014
DOI: 10.1130/2014.2503(11)
... of climatic change on the distribution of turtles within the Late Cretaceous–earliest Paleogene record of the Hell Creek area of northeastern Montana, where long-term field studies have produced a relatively dense record of faunal change during a period of climatic fluctuation. An improved stratigraphic...
Series: GSA Special Papers
Published: 01 January 2014
DOI: 10.1130/2014.2503(15)
... The Cretaceous-Paleogene boundary marks a critical event in mammalian evolution. Using a database of 4769 mammalian specimens from the Hell Creek and lower Fort Union formations of Garfield County, northeastern Montana, I quantified temporal patterns of diversity and community structure...
Journal Article
Journal: Paleobiology
Published: 09 May 2013
Paleobiology (2013) 39 (3): 429-469.
... ecomorphological selectivity and ecospace filling across this critical transition. Focusing on well-sampled and temporally well-constrained mammalian faunas across the K/Pg boundary in northeastern Montana, I quantified dental-shape disparity and morphospace occupancy via landmark- and semilandmark-based geometric...
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Journal Article
Journal: PALAIOS
Published: 01 January 2010
PALAIOS (2010) 25 (2): 132-140.
... carnivorous turtle. Champsosaurus was of a size (1.5 m, 15–20 kg) commensurate with the size of the coprolite, and its remains are abundant in the Hell Creek Formation of northeastern Montana ( Carroll, 1988 ). The remains of such large carnivorous turtles as Axestemys and Protochelydra are found...
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Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE247-p549
... This chapter documents survivorship across the Cretaceous/Tertiary (K/T) (and Lancian/Puercan) boundary for all 111 species of nonmarine vertebrates from Garfield and McCone counties, Montana. Species-level survivorship appears to be between about 53 and 64 percent after the artifacts caused...
Journal Article
Journal: Geology
Published: 01 March 1982
Geology (1982) 10 (3): 153-159.
...J. David Archibald; Robert F. Butler; Everett H. Lindsay; William A. Clemens; Lowell Dingus Abstract Fossils from the Hell Creek and Tullock Formations in northeastern Montana provide detailed documentation of terrestrial faunal and floral evolution during latest Cretaceous (Lancian) and early...
Journal Article
Published: 01 November 1978
Journal of Paleontology (1978) 52 (6): 1388-1389.
Journal Article
Published: 01 November 1977
Journal of Paleontology (1977) 51 (6): 1161-1180.
Journal Article
Journal: AAPG Bulletin
Published: 01 September 1966
AAPG Bulletin (1966) 50 (9): 2038.
...R. E. Swenson ABSTRACT The Upper Devonian Nisku Formation became a productive unit for the first time in late 1960, when the Tule Creek field was discovered in northeastern Montana. Since then 6 additional Nisku fields have been discovered within a 10-mi. radius of Tule Creek. Even-textured...
Journal Article
Journal: GSA Bulletin
Published: 01 May 1958
GSA Bulletin (1958) 69 (5): 575-588.
...ARTHUR DAVID HOWARD Abstract Topography and the distribution of gravels support suggestions by earlier investigators that the master streams of northeastern Montana and northwestern North Dakota flowed northward across the present trench of the Missouri until diverted in the Pleistocene. The age...
Journal Article
Journal: GSA Bulletin
Published: 01 August 1952
GSA Bulletin (1952) 63 (8): 881.
Journal Article
Journal: Economic Geology
Published: 01 April 1979
Economic Geology (1979) 74 (2): 358-376.
...S. B. Anderson; R. P. Swinehart Abstract The potash deposits of North Dakota and Montana are extensions of the rich deposits now being mined in Saskatchewan. These deposits underlie 28,500 km 2 (11,000 sq miles) in northwestern North Dakota and 7,800 km 2 (3,000 sq miles) in northeastern Montana...
Journal Article
Journal: AAPG Bulletin
Published: 01 January 1959
AAPG Bulletin (1959) 43 (1): 124-189.
...J. W. Porter; J. G. C. M. Fuller ABSTRACT Cambrian, Ordovician, and Silurian strata of Manitoba, Saskatchewan, northern North Dakota, and northeastern Montana comprise two vertically separated parts: a lower sequence of non-carbonate clastic beds ranging from Cambrian to Upper Ordovician...
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