Zobrazeno 1 - 10
of 48
pro vyhledávání: '"R.G. Tysdal"'
Publikováno v:
Cretaceous Research. 18:751-766
An 40 Ar/ 39 Ar age of 85.81 Ma±0.22 my was obtained on sanidine from a volcanic procellanite bed near the top of the 2135+m-thick Upper Cretaceous Frontier Formation in the Lima Peaks area of southwestern Montana. This early Santonian age, combined
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ce68181127b58f0089df1cbb081885e
https://doi.org/10.1006/cres.1997.0079
https://doi.org/10.1006/cres.1997.0079
Publikováno v:
Open-File Report.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df8b2d25caa4cd6271e7bc2e40aace89
https://doi.org/10.3133/ofr95841
https://doi.org/10.3133/ofr95841
Autor:
R.G. Tysdal, T.S. Dyman
The Lower and Upper Cretaceous Blackleaf Formation in the Lima Peaks area and the eastern Pioneer Mountains of southwestern Montana was deposited at the western margin of the Western Interior seaway as a nonmarine fades of the Cordilleran foreland ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3240748e82be4d58b5a18709f754ec85
https://doi.org/10.3133/mf2119
https://doi.org/10.3133/mf2119
The Jake Canyon reverse fault trends northwest for more than 18 mi along the northeastern flank of the Blacktail Mountains. Archean metamorphic rocks are displaced over Paleozoic carbonate strata along the northwestern part of the fault and are displ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::037e695999198bc6f4cef9b6793f6775
https://doi.org/10.3133/b1922
https://doi.org/10.3133/b1922
The Upper Cretaceous Frontier Formation in southwestern Montana was deposited in the foreland basin of the Cordillera in the west and shelf facies of the foreland in the east. Lateral and vertical changes in the lithology of the formation reflect bot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1147823cea7a3992bf5a4757afbd4292
https://doi.org/10.3133/mf2116
https://doi.org/10.3133/mf2116