《upper cretaceous floras of the rocky mountain region》求取 ⇩

作者	erling dorf 编者
出版	institution of Washington publication
参考页数	168 ✅ 真实服务非骗流量 ❤️
出版时间	1942（求助前请核对）目录预览
ISBN号	无 — 违规投诉 / 求助条款
PDF编号	813814908（学习资料勿作它用）
求助格式	扫描PDF（若分多册发行，每次仅能受理1册）

upper cretaceous floras of the rocky mountain region 1942 PDF电子版封面 erling dorf

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Ⅰ. STRATIGRAPHY AND PAL?ONTOLOGY OF THE FOX HILLS AND LOWER MEDICINE BOW FORMATIONS OF SOUTHERN WYOMING AND NORTHWESTERN COLORADO (nineteen plates and eight text figures)1

Introduction1

Present Physical Conditions and Vegetation2

Stratigraphy4

Southern Wyoming4

Northwestern Colorado7

Local Sections and Maps9

Composition of the Flora22

Systematic Relationships22

Quantitative Analysis23

Leaf Characters25

Past Climatic Conditions as Indicated by the Flora27

Correlation31

Summary36

Systematic Pal?obotany38

General Procedure38

Synonyms and Changes of Names40

Descriptions43

Ⅱ. FLORA OF THE LANCE FORMATION AT ITS TYPE LOCALITY, NIOBRARA COUNTY, WYOMING (seventeen plates and three text figures)79

Introduction83

Earlier Work in the Area84

Stratigraphy88

Composition of the Flora97

Systematic Relationships97

Quantitative Analysis98

Climatic Conditions Indicated by the Lance Flora100

Correlation103

Summary122

Systematic Pal?obotany124

Synonyms and Changes of Names124

Descriptions126

INDEX OF GENERA AND SPECIES161

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