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AmmonoideaJurassic (Bathonian and Callovian) ammonites in eastern Oregon and western IdahoRalph W. Imlay

Jurassic (Bathonian and Callovian) ammonites in eastern Oregon and western Idaho

Ralph W. Imlay · U.S. Dept. of the Interior, Geological Survey

24 sayfa · 1980

Paleontology / Ammonoidea

PaleontologyCallovian (Jurassic) ammonites from the United States and AlaskaRalph W. Imlay

Callovian (Jurassic) ammonites from the United States and Alaska

Ralph W. Imlay · U.S. G.P.O.

74 sayfa · 1952

Ammonoidea / Paleontology

PaleontologyJurassic paleobiogeography of the conterminous United States in its continental settingRalph W. Imlay

Jurassic paleobiogeography of the conterminous United States in its continental setting

Ralph W. Imlay · for sale by the Supt. of Docs., U.S. Govt. Print. Off.

134 sayfa · 1977

Geology / Geology, Stratigraphic / Paleobiogeography / Paleogeography / Paleontology

Stratigraphic GeologyLower Cretaceous and Jurassic formations of Southern Arkansas and their oil and gas possibilitiesRalph W. Imlay

Lower Cretaceous and Jurassic formations of Southern Arkansas and their oil and gas possibilities

Ralph W. Imlay · Yayınevi bilinmiyor

64 sayfa · 1940

Geology / Stratigraphic Geology

PaleontologyGypidula petoskeyensis, sp. nov., a new brachiopod from the Traverse group of MichiganRalph W. Imlay

Gypidula petoskeyensis, sp. nov., a new brachiopod from the Traverse group of Michigan

Ralph W. Imlay · University of Michigan Press

104 sayfa · 1932

Gypidula petoskeyensis / Fossil Brachiopoda / Paleontology

Stratigraphic GeologyEarly Cretaceous (Albian) ammonites from the Chitina Valley and Talkeetna Mountains, AlaskaRalph W. Imlay

Early Cretaceous (Albian) ammonites from the Chitina Valley and Talkeetna Mountains, Alaska

Ralph W. Imlay · U.S. Govt. Print. Off.

114 sayfa · 1960

Ammonoidea / Stratigraphic Geology

AmmonoideaLate Jurassic ammonites from the western Sierra Nevada, CaliforniaRalph W. Imlay

Late Jurassic ammonites from the western Sierra Nevada, California

Ralph W. Imlay · U.S. Govt. Print. Off.

30 sayfa · 1961

Paleontology / Ammonoidea

PaleontologyAmmonites of early cretaceous age (Valanginian and Hauterivian) from the Pacific coast statesRalph W. Imlay

Ammonites of early cretaceous age (Valanginian and Hauterivian) from the Pacific coast states

Ralph W. Imlay · U.S. Govt. Print. Off.

228 sayfa · 1960

Ammonoidea / Stratigraphic Geology / Paleontology

AmmoniedaJurassic (Bathonian or early Callovian) ammonites from Alaska and MontanaRalph W. Imlay

Jurassic (Bathonian or early Callovian) ammonites from Alaska and Montana

Ralph W. Imlay · U.S. Govt. Print. Off.

32 sayfa · 1962

Ammonoidea / Stratigraphic Geology / Ammonieda

Stratigraphic GeologyCharacteristic marine Jurassic fossils from the western interior of the United StatesRalph W. Imlay

Characteristic marine Jurassic fossils from the western interior of the United States

Ralph W. Imlay · U.S. G.P.O.

35 sayfa · 1948

Ammonoidea / Paleontology / Stratigraphic Geology

PaleontologyCharacteristic Lower Cretaceous megafossils from northern AlaskaRalph W. Imlay

Characteristic Lower Cretaceous megafossils from northern Alaska

Ralph W. Imlay · U.S. Govt. Print. Off.

74 sayfa · 1960

Fossil Invertebrates / Paleontology

PaleontologyCharacteristic Jurassic mollusks from northern AlaskaRalph W. Imlay

Characteristic Jurassic mollusks from northern Alaska

Ralph W. Imlay · U.S. G.P.O.

96 sayfa · 1955

Fossil Mollusks / Paleontology

Fossil MollusksCharacteristic Jurassic mollusks from northern AlaskRalph W. Imlay

Characteristic Jurassic mollusks from northern Alask

Ralph W. Imlay · U.S. G.P.O.

96 sayfa · 1955

Fossil Mollusks

GeologyGeology of the Sierra de Cruillas, Tamaulipas, MexicoRalph W. Imlay, University of Michigan. Dept. of Geology

Geology of the Sierra de Cruillas, Tamaulipas, Mexico

Ralph W. Imlay, University of Michigan. Dept. of Geology · Yayınevi bilinmiyor

60 sayfa · 1931

Geology