Results 191 to 200 of about 8,547 (241)

Lower Devonian-Middle Devonian Boundary in Central Nevada: GEOLOGICAL NOTES

AAPG Bulletin, 1962
New fossil collections from beds immediately overlying the long established "Spirifer" pinyonensis zone show that there is a complete faunal break between these horizons in the northern Roberts Mountains and in the northern Simpson Park Range, central Nevada.
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A primitive dipnoan fish from the Lower Devonian of Germany

Proceedings of the Royal Society of London. Series B - Biological Sciences, 1952
Abstract A detailed description of a partial skull of the earliest yet known dipnoan, Dipnorhynchus lehmanni Westoll from the Hunsriickschiefer (Upper Siegenian, Lower Devonian) of the Bundenbaeh area, is given. This skull shares with D. sussmilchi (Eth.
W, LEHMANN, T S, WESTOLL
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Pterygotid eurypterid chelicera from the Lower Devonian of Victoria

Alcheringa: An Australasian Journal of Palaeontology, 2001
A single eurypterid (Arthropoda: Chelicerata) chelicera, assigned to Acutiramus sp. cf. A. bohemicus, is described from the Wilson Creek Shale, Turtons Creek inlier, north of Foster, Victoria, Australia. The specimen comprises the proximal portion of both rami.
Burrow, Carole J., Braddy, Simon J., Douglas, John G.   +2 more
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The Lochkovian (Lower Devonian) of the Carnic Alps

2023
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CORRIGA M. G., CORRADINI C., PONDRELLI M., SIMONETTO L   +3 more
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Stratigraphy and Facies Across Lower Devonian-Middle Devonian Boundary, Central Nevada

AAPG Bulletin, 1983
ABSTRACT A regressive episode near the end of the Early Devonian caused a nearshore quartzose carbonate facies to shift to the edge of the carbonate shelf in central Nevada. Transgression followed in the latest Early Devonian and continued in the early Middle Devonian.
G. W. Kendall, J. G. Johnson, J. O. Brow, G. Klapper   +3 more
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A new zosterophyll from the Lower Devonian of Wales

Botanical Journal of the Linnean Society, 1986
A new monotypic genus is described from impression and compression fossils preserved in the Senni Beds of the Lower Old Red Sandstone of S Wales. The new species has scattered reniform lateral sporangia suggesting zosterophyll affinity, but supporting anatomical evidence is lacking.
DIANNE EDWARDS, P. KENRICK
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Lower Devonian Gametophytes: Relation to the Phylogeny of Land Plants

Science, 1982
Three gametophytic plants now known from the Lower Devonian of Scotland and Germany show common features in their fertile parts. The morphological and anatomical structures indicate affinities to bryophytic gametophytes, although there is no evidence for a parasitic sporogonium-like sporophyte as in the Bryophyta.
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Silurian-Devonian Boundary and Correlation of Lower Devonian of Soviet and Canadian Arctic: ABSTRACT

AAPG Bulletin, 1970
Lower Devonian marine sediments are widespread in Arctic regions and are represented by different stratigraphic sequences. Until recently the boundary with underlying Silurian deposits was an arbitrary one. At present the boundary in graptolitic sections is drawn at the base of the Monograptus uniformis zone (in Pay-Khoy, Alaska, Yukon, and other ...
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The Devonian accretionary orogen of the North Patagonian cordillera

Gondwana Research, 2021
CARLOS W Rapela, FRANCISCO Hervé, Mauricio Calderon   +2 more
exaly  

A review of Devonian–Carboniferous magmatism in the central region of Argentina, pre-Andean margin of SW Gondwana

Earth-Science Reviews, 2021
Juan A Dahlquist, Matias M Morales Camera, Pablo H Alasino   +2 more
exaly