Results 211 to 220 of about 2,119,061 (274)

Upper Devonian depositional system of Bel’kov Island (New Siberian Islands): An intracontinental rift or a continental margin?

Geotectonics, 2014
M K Danukalova, A B Kuzmichev, Kuzmichev A B   +2 more
exaly   +2 more sources

VI.—Upper Devonian in Devonshire

Geological Magazine, 1880
Having read Mr. Reid's letter on the above subject in the GeologicalMagazine for June, referring to the Chudleigh district, I beg to offer you a few lines of my own, in hopes of clearing up some confusion that may exist on the subject.
openaire   +1 more source

Correlation of the upper devonian rocks of Australia

Journal of the Geological Society of Australia, 1972
(1972). Correlation of the upper devonian rocks of Australia. Journal of the Geological Society of Australia: Vol. 18, No. 4, pp. 467-490.
J. Roberts, P. J. Jones, J. S. Jell, T. B. H. Jenkins, M. A. H. Marsden, R. G. Mckellar, B. C. Mckelvey, G. Seddon   +7 more
openaire   +1 more source

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 ...
openaire   +1 more source

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.
openaire   +1 more source

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.
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +2 more sources

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 ...
openaire   +1 more source

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.
openaire   +1 more source