Results 151 to 160 of about 2,421 (198)

Faunal differentiation in the Upper Devonian

Geological Society of America Bulletin, 1935
FOREWORD This is a preliminary compilation and analysis of Upper Devonian faunas, recognizedly incomplete. The compiler seeks the aid of others to ameliorate its errors and omissions so that a more perfect list may eventuate. Nevertheless, as it stands, it will serve to rectify widespread correlations of the American Upper Devonian strata, by ...
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III.—The Upper Devonian Fishes of Ohio

Geological Magazine, 1893
Under the true Carboniferous strata of Ohio, that is below the base of the Berea Grit, lies a mass of shale of varying colour many hundred feet in thickness. The uppermost fifty or sixty feet are often red or reddish, and have been separated with the name of the Bedford Shale.
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UPPER DEVONIAN UNCONFORMITY IN CENTRAL UTAH

Geological Society of America Bulletin, 1959
Rocks equivalent to the upper Devonian Pinyon Peak limestone and Victoria quartzite occur unconformably above older rock units in central and east-central Utah. This unconformity is perhaps most profound in the Stansbury Range where Pinyon Peak limestone overlies rocks as old as the upper part of the Tintic quartzite and as young as Simonson dolomite ...
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Metamorphism in the Upper Devonian of N. Cornwall

Geological Magazine, 1928
The geological succession and structure of the district are briefly summarized. Evidence of stress conditions becomes increasingly abundant as one passes from south to north towards the boundary of the Carboniferous.The thermal alteration due to the Bodmin Moor granite is definitely delimited by tracing the outer limit of spotting in normal pelitic ...
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Continental upper Devonian of northeastern Pennsylvania

Geological Society of America Bulletin, 1936
INTRODUCTION The geological map of Pennsylvania, published in 1931 by the Pennsylvania Topographic and Geologic Survey and based, so far as the Devonian and Mississippian in the northeastern quarter are concerned, upon the work of the Second Pennsylvania Survey, gives a generalized, inaccurate picture of that region.
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Fossils of Uncertain Affinity from the Upper Devonian of Iowa

Science, 1975
Thousands of specimens of the enigmatic fossil Gluteus minimus (new genus, new species) occur in a 5-centimeter-thick interval within the Maple Mill Shale and in equivalent deposits of the Devonian of eastern Iowa. They are roughly lenticular. bilobed fossils up to 11 millimeters in diameter and 8 millimeters thick.
R A, Davis, H A, Semken
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Spores and the middle-upper Devonian boundary

Review of Palaeobotany and Palynology, 1981
The stratigraphic levels most favoured for the Middle-Upper Devonian boundary fall approximately within the range of the ammonoid Pharciceras lunulicosta Zone, i.e. from the Middle varcus Subzone to the base of the Lower asymmetricus Zone of the conodont scale.
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Upper Devonian Spirifers of the Catskill Delta

Nature, 1959
“Spirifer disjunctus” Its Evolution and Paleoecology in the Catskill Delta. By Hugo Greiner. (Peabody Museum of Natural History, Yale University, Bulletin No. 11.) Pp. iv + 75 + 13 plates. (New Haven, Conn.: Peabody Museum of Natural History, Yale University, 1957.) n.p.
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Upper Devonian Charophyta of Western Australia

Micropaleontology, 2003
Charophytes are described and illustrated from the Upper Devonian of Western Australia, including five genera and nine species of which four are new species. Most belong to the Family Umbellinaceae being placed in a new Class Umbellinaphyceae of the Division Charophyta.
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Glassy Microspherules (Microtektites) from an Upper Devonian Limestone

Science, 1992
The properties of microspherules recovered from an Upper Devonian marine limestone immediately overlain by a geochemical anomaly of siderophile and chalcophile elements are similar to those of impact-derived microtektites. These microspherules are glass, have splash-form shapes, contain spherical vesicles and lechatelierite inclusions, and show oxide ...
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