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Jurassic (Bathonian Or Early Callovian) Ammonites from Alaska and Montana

Jurassic (Bathonian Or Early Callovian) Ammonites from Alaska and Montana PDF Author: Ralph Willard Imlay
Publisher:
ISBN:
Category : Ammonieda
Languages : en
Pages : 56

Book Description
Descriptions and illustrations of cephalopods of possible late Middle Jurassic (Bathonian) age.

Jurassic (Bathonian Or Early Callovian) Ammonites from Alaska and Montana

Jurassic (Bathonian Or Early Callovian) Ammonites from Alaska and Montana PDF Author: Ralph Willard Imlay
Publisher:
ISBN:
Category : Ammonieda
Languages : en
Pages : 56

Book Description
Descriptions and illustrations of cephalopods of possible late Middle Jurassic (Bathonian) age.

Geological Survey Professional Paper

Geological Survey Professional Paper PDF Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 414

Book Description

U.S. Geological Survey Professional Paper

U.S. Geological Survey Professional Paper PDF Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 918

Book Description

Geological Survey Professional Paper

Geological Survey Professional Paper PDF Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 86

Book Description

Jurassic Paleobiogeography of the Conterminous United States in Its Continental Setting

Jurassic Paleobiogeography of the Conterminous United States in Its Continental Setting PDF Author: Ralph Willard Imlay
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 144

Book Description
Paleogeographic changes in the United States during Jurassic time are revealed by the distribution, succession, and differentiation of molluscan faunas; by gross stratigraphic changes; by the position, extent, and duration of unconformities; and by comparisons with Jurassic data elsewhere in North America.

Zonation and Correlation of Middle Boreal Bathonian to Lower Callovian (Jurassic) Ammonites, Salmon Cache Canyon, Porcupine River, Northern Yukon

Zonation and Correlation of Middle Boreal Bathonian to Lower Callovian (Jurassic) Ammonites, Salmon Cache Canyon, Porcupine River, Northern Yukon PDF Author: T. P. Poulton
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 168

Book Description
"This study describes the ammonites from a single, richly fossiliferous, and well exposed locality in northern Yukon where a succession of seven faunas is present. A new zonation for northwestern Canada is proposed based on this succession. The ammonites are mainly Boreal, and correlations of each zone with the published successions across the Arctic are discussed." --

U.S. Government Research Reports

U.S. Government Research Reports PDF Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 144

Book Description

Geological Association of Canada Special Paper

Geological Association of Canada Special Paper PDF Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 336

Book Description

Twin Creek Limestone (Jurassic) in the Western Interior of the United States

Twin Creek Limestone (Jurassic) in the Western Interior of the United States PDF Author: Ralph Willard Imlay
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 164

Book Description
A description of the stratigraphic and faunal succession in the Twin Creek Limestone and regional comparisons with contemporary formations.

Publications of the Geological Survey

Publications of the Geological Survey PDF Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 548

Book Description

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