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Berwind Canyon

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Astropectinid sea star from <span class="search-highlight">Berwind</span> <span class="search-highlight">Canyon</span>, Colorado. Original mold of an a...
Published: 01 June 2017
Figure 5. Astropectinid sea star from Berwind Canyon, Colorado. Original mold of an astropectinid sea star (NMMNH P-78593) collected from the top of the Pierre Shale at Berwind Canyon, Colorado (NMMNH Locality L-10795; see Berry, 2010 , 2016 ). In this paper, this sea star is assigned
Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2008.2437(12)
..., our study sections in southwestern South Dakota are most similar to, and may correlate with, the recently documented 68 Ma impactite within the Vermejo Formation of Berwind Canyon in southeastern Colorado. If this correlation is correct, the size of the ejecta within the Fox Hills and Vermejo...
FIGURES | View All (6)
Journal Article
Journal: Geology
Published: 01 March 1995
Geology (1995) 23 (3): 281–284.
... in proportion to the intensity of shock metamorphism exhibited by each zircon. The age and zircon shock features establish a strong temporal and genetic link with K-T distal ejecta from the fireball layer at the Berwind canyon site in the Raton basin, Colorado, where texturally similar zircons from a previous...
Image
Stratigraphy of the Raton Basin, south-central Colorado. Composite geologic...
Published: 01 June 2017
Figure 3. Stratigraphy of the Raton Basin, south-central Colorado. Composite geologic column for the Maastrichtian strata in Berwind Canyon, which merges with Road Canyon (not illustrated in Fig. 1 ) to the immediate west (Raton Basin, south-central Colorado; NMMNH Localities L-10780 through L
Image
( a ) Percentage of inertinite (charred material) across the K–T boundary f...
Published: 01 July 2005
gram of sediment). Three intervals at Madrid East South and Berwind Canyon have been truncated (bars containing asterisks), as they contain some very large peaks in abundance of charcoal. The large peak at Madrid East South is 19 707 particles of charcoal per gram of sediment and the largest peak
Image
Comparison of the δ 13 C record across the K–T boundary in terrestrial sect...
Published: 31 May 2007
. ( 2001 ), and Gardner and Gilmour ( 2002 ). All sections are correlated at the top of the iridium anomaly layer (gray dashed line). Asterisk marks the location of the most negative δ 13 C values interpreted to be associated with K–T boundary. Note that only the Knudsen’s Farm, Brownie Butte, and Berwind
Image
Affinity of an early late-Maastrichtian astropectinid sea star from the Rat...
Published: 01 June 2017
at Berwind Canyon, Colorado (NMMNH Locality L-10795). Note the conspicuous absence of large, horseshoe-shaped spine tubercles on these apparently smooth inferomarginal ossicles, which supports the taxonomic assignment of NMMNH P-78593 to the genus Lophidiaster ( Hess, 1955 ). Photograph by K. Berry. B
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A biostratigraphically important leaf fossil from the Vermejo-Raton megaflo...
Published: 01 June 2017
Figure 6. A biostratigraphically important leaf fossil from the Vermejo-Raton megafloras. A , “Cissites” panduratus (NMMNH P-78592) from the upper coal zone (Paleocene) of the Raton Formation in Road Canyon, Colorado, which merges with Berwind Canyon to the east (see Fig. 1 ; NMMNH Locality
Image
Appearance and texture of zircon in meteorite impact structures.  (1, 2)  S...
Published: 02 January 2003
structure, modified from Kamo et al. (1996) , SEM. (8, 9) polycrystalline grains with degassing and melting textures; 8 – K/T distal impact ejecta, Berwind Canyon, Colorado, modified from Bohor et al. (1993) ; SEM; 9 – Onaping Formation (impact melt), Sudbury structure, modified from Krogh et al. (1996
Journal Article
Published: 01 June 2017
Rocky Mountain Geology (2017) 52 (1): 1–16.
...Figure 5. Astropectinid sea star from Berwind Canyon, Colorado. Original mold of an astropectinid sea star (NMMNH P-78593) collected from the top of the Pierre Shale at Berwind Canyon, Colorado (NMMNH Locality L-10795; see Berry, 2010 , 2016 ). In this paper, this sea star is assigned...
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Image
Late Campanian–early Maastrichtian paleogeography of the Western Interior S...
Published: 01 June 2017
, indicate that this shoreline should be shifted about 100 km farther west (white arrow) to a geographic location in the immediate vicinity of Berwind Canyon, Colorado.
Journal Article
Published: 01 July 2005
Journal of the Geological Society (2005) 162 (4): 591–602.
... gram of sediment). Three intervals at Madrid East South and Berwind Canyon have been truncated (bars containing asterisks), as they contain some very large peaks in abundance of charcoal. The large peak at Madrid East South is 19 707 particles of charcoal per gram of sediment and the largest peak...
FIGURES | View All (8)
Journal Article
Journal: Geology
Published: 01 December 2003
Geology (2003) 31 (12): 1061–1064.
...% at Rick's Place) noncharred organic material, commonly as vitrinite laminae ( Fig. 2B ). Vitrinite laminae are also recorded in the upper claystone at southern sites ( Izett, 1990 : Berwind Canyon, Clear Creek North, and Madrid East, Colorado) and at northern sites ( Sweet et al., 1999 : Knudsen's Coulee...
FIGURES
Journal Article
Published: 31 May 2007
Canadian Journal of Earth Sciences (2007) 44 (4): 529–542.
.... ( 2001 ), and Gardner and Gilmour ( 2002 ). All sections are correlated at the top of the iridium anomaly layer (gray dashed line). Asterisk marks the location of the most negative δ 13 C values interpreted to be associated with K–T boundary. Note that only the Knudsen’s Farm, Brownie Butte, and Berwind...
FIGURES | View All (7)
Journal Article
Published: 10 January 2018
Seismological Research Letters (2018) 89 (2A): 570–576.
... at Sugarite Mine 3, New Mexico (36°56′39.89″ N, 104°22′32.40″ W), and Berwind Canyon, New Mexico (37°17′43.79″ N, 104°37′39.90″ W), were unsuitable for searching for faults. Road cuts expose the K–Pg layer in Long’s Canyon within Trinidad State Park and at nearby Madrid Canyon (Fig.  1b...
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Journal Article
Published: 10 December 2010
Canadian Journal of Earth Sciences (2011) 48 (2): 107–116.
.... (1993 a ) reported the results of single-grain thermal ionization mass spectrometry (TIMS) U–Pb analyses of shocked zircons from a sample of distal ejecta at the K–T (Cretaceous–Tertiary) boundary layer at the Berwind Canyon site in the Raton Basin, Colorado. Data points define a linear array...
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Journal Article
Published: 02 January 2003
Reviews in Mineralogy and Geochemistry (2003) 53 (1): 469–500.
... structure, modified from Kamo et al. (1996) , SEM. (8, 9) polycrystalline grains with degassing and melting textures; 8 – K/T distal impact ejecta, Berwind Canyon, Colorado, modified from Bohor et al. (1993) ; SEM; 9 – Onaping Formation (impact melt), Sudbury structure, modified from Krogh et al. (1996...
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