Matches in SemOpenAlex for { <https://semopenalex.org/work/W1909348408> ?p ?o ?g. }
Showing items 1 to 73 of
73
with 100 items per page.
- W1909348408 endingPage "219" @default.
- W1909348408 startingPage "205" @default.
- W1909348408 abstract "Abstract The Upper Cretaceous Niobrara Formation in North and South Dakota can be subdivided into three distinct stratigraphic/geographic areas. In the western Dakotas, chalk and calcareous shale, approximately 120 m (400 ft) thick, grade westward into the non-calcareous Gammon Ferruginous Member of the Pierre Shale which is over 370 m (1,200 ft) thick. In eastern North Dakota, the Niobrara, approximately 60 m (200 ft) thick, consists of a lower calcareous shale and an upper chalk and shaly chalk. In central South Dakota, the Niobrara, about 60 m (200 ft) thick, consists of two separate chalk tongues which merge eastward into a single massive chalk unit. The top of the Niobrara is marked by an unconformity throughout most of eastern North Dakota and central South Dakota. Well logs indicate that erosional channels are present on this surface and in central South Dakota the unconformity is exposed along the Missouri River. Published depositional and paleotectonic models for the Niobrara are refined as a result of interpretations produced by this study. A carbonate ramp which sloped westward into deeper water in the western Dakotas was subdivided into two different depositional settings. On the shallow-water part of the ramp in eastern North Dakota, some terrigenous material was mixed with the chalks and paleoslopes were probably very low. Near the crest of the Transcontinental Arch in central South Dakota, water depths on the ramp were at a minimum and chalk, protected from clastic dilution, was deposited. Exploration potential for biogenic gas is poor in the western Dakotas, intermediate in eastern North Dakota, and best in central South Dakota." @default.
- W1909348408 created "2016-06-24" @default.
- W1909348408 creator A5045648766 @default.
- W1909348408 creator A5055231022 @default.
- W1909348408 date "1984-01-01" @default.
- W1909348408 modified "2023-09-26" @default.
- W1909348408 title "Stratigraphic Framework of the Niobrara Formation (Upper Cretaceous) in North and South Dakota" @default.
- W1909348408 hasPublicationYear "1984" @default.
- W1909348408 type Work @default.
- W1909348408 sameAs 1909348408 @default.
- W1909348408 citedByCount "4" @default.
- W1909348408 crossrefType "journal-article" @default.
- W1909348408 hasAuthorship W1909348408A5045648766 @default.
- W1909348408 hasAuthorship W1909348408A5055231022 @default.
- W1909348408 hasConcept C109007969 @default.
- W1909348408 hasConcept C12294951 @default.
- W1909348408 hasConcept C126457475 @default.
- W1909348408 hasConcept C126753816 @default.
- W1909348408 hasConcept C127313418 @default.
- W1909348408 hasConcept C138170599 @default.
- W1909348408 hasConcept C151730666 @default.
- W1909348408 hasConcept C153127940 @default.
- W1909348408 hasConcept C17409809 @default.
- W1909348408 hasConcept C191735495 @default.
- W1909348408 hasConcept C19320362 @default.
- W1909348408 hasConcept C199285206 @default.
- W1909348408 hasConcept C2777760186 @default.
- W1909348408 hasConcept C48258643 @default.
- W1909348408 hasConcept C6494504 @default.
- W1909348408 hasConceptScore W1909348408C109007969 @default.
- W1909348408 hasConceptScore W1909348408C12294951 @default.
- W1909348408 hasConceptScore W1909348408C126457475 @default.
- W1909348408 hasConceptScore W1909348408C126753816 @default.
- W1909348408 hasConceptScore W1909348408C127313418 @default.
- W1909348408 hasConceptScore W1909348408C138170599 @default.
- W1909348408 hasConceptScore W1909348408C151730666 @default.
- W1909348408 hasConceptScore W1909348408C153127940 @default.
- W1909348408 hasConceptScore W1909348408C17409809 @default.
- W1909348408 hasConceptScore W1909348408C191735495 @default.
- W1909348408 hasConceptScore W1909348408C19320362 @default.
- W1909348408 hasConceptScore W1909348408C199285206 @default.
- W1909348408 hasConceptScore W1909348408C2777760186 @default.
- W1909348408 hasConceptScore W1909348408C48258643 @default.
- W1909348408 hasConceptScore W1909348408C6494504 @default.
- W1909348408 hasLocation W19093484081 @default.
- W1909348408 hasOpenAccess W1909348408 @default.
- W1909348408 hasPrimaryLocation W19093484081 @default.
- W1909348408 hasRelatedWork W1568603984 @default.
- W1909348408 hasRelatedWork W1716312529 @default.
- W1909348408 hasRelatedWork W1731980175 @default.
- W1909348408 hasRelatedWork W1743386456 @default.
- W1909348408 hasRelatedWork W1973461334 @default.
- W1909348408 hasRelatedWork W1978025917 @default.
- W1909348408 hasRelatedWork W2006673669 @default.
- W1909348408 hasRelatedWork W2052598905 @default.
- W1909348408 hasRelatedWork W2062187496 @default.
- W1909348408 hasRelatedWork W2067727424 @default.
- W1909348408 hasRelatedWork W2077660298 @default.
- W1909348408 hasRelatedWork W2079998273 @default.
- W1909348408 hasRelatedWork W2090785213 @default.
- W1909348408 hasRelatedWork W2101303976 @default.
- W1909348408 hasRelatedWork W2150649873 @default.
- W1909348408 hasRelatedWork W2164178199 @default.
- W1909348408 hasRelatedWork W2215979552 @default.
- W1909348408 hasRelatedWork W2244879637 @default.
- W1909348408 hasRelatedWork W2266888937 @default.
- W1909348408 hasRelatedWork W2086283155 @default.
- W1909348408 isParatext "false" @default.
- W1909348408 isRetracted "false" @default.
- W1909348408 magId "1909348408" @default.
- W1909348408 workType "article" @default.