Results 71 to 80 of about 8,458 (202)

CONODONT BIOSTRATIGRAPHY OF THE "OCKERKALK" (SILURIAN) FROM SOUTHEASTERN SARDINIA

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2017
Twenty-two conodont species are recognized in the Ockerkalk exposed in the Silius area (Gerrei, southeastern Sardinia). The fauna, which is the first reported from this peculiar facies, indicates a Ludlow and e.-m. Pridoli age for this limestone.
SEBASTIANO BARCA   +4 more
doaj   +1 more source

New late Tremadocian (Early Ordovician) conodont and graptolite records from the southern South American Gondwana margin (Eastern Cordillera, Argentina) [PDF]

open access: yes, 2008
New late Tremadocian (Early Ordovician) conodont and graptolite faunas from the eastern and central belts of the Eastern Cordillera (Jujuy Province, northwestern Argentina) are reported.
Albanesi, G. L.,   +2 more
core   +2 more sources

The Spatial and Temporal Evolution of Mixed Carbonate‐Clastic Mud‐Dominated Basin Fill Successions: The Middle to Late Devonian Shelf Margin, Western Canada

open access: yesBasin Research, Volume 37, Issue 6, November/December 2025.
The spatial interplay between updip clastic and carbonate depositional systems and downdip detrital and biogenic mud dominated depositional systems are mapped temporally using the sequence stratigraphic method to predict the occurrence of aquifers, petroleum reservoirs and organic‐rich deposits. ABSTRACT Middle to Upper Devonian strata preserved in the
Rene Jonk, Kevin Bohacs, Ken Potma
wiley   +1 more source

Middle Ordovician conodonts and graptolites at Los Cauquenes range, central Precordillera of San Juan, Argentina [PDF]

open access: yes, 2013
The Ordovician System is superbly represented in the Precordillera of western Argentina, at the Andean foothills. During the Middle Ordovician, an important paleogeographical rearrangement of depocenters and source areas took place associated with the ...
Albanesi, Guillermo Luis   +2 more
core  

Scottish Carboniferous conodonts [PDF]

open access: yesTransactions of the Edinburgh Geological Society, 1960
The Scottish Carboniferous conodonts described by Hinde and figured by Smith in 1900 are refigured and redescribed. Additional specimens from the John Smith collection and from the writer's own collection are described. Sixteen genera of conodonts are shown to be present in the Scottish Carboniferous and thirty species, of which seventeen are new, are ...
openaire   +1 more source

Historical Biogeography of Spiny Lobsters in the Genus Panulirus (Achelata: Palinuridae)

open access: yesJournal of Biogeography, Volume 52, Issue 11, November 2025.
ABSTRACT Aim Panulirus is the spiny lobster genus with the most living species, containing 22 recognised species split into two lineages distinguished by habitat preference. Diversification has been proposed to occur due to geographic events affecting the distribution of adults and the dispersal potential of long‐lived larvae by oceanic currents ...
Alyssa M. Baker   +2 more
wiley   +1 more source

Biostratigraphic and Lithostratigraphic Analysis of the Hindsville Limestone (Mississippian) in Northwestern Arkansas [PDF]

open access: yes, 1974
Several lithofacies can be recognized within the Hindsville Limestone (Mississippian) in its type area near Hindsville, Madison County, Arkansas. Lithofacies are based on petrographic analysis of matrix and constituent particles, particularly ooliths and
Grayson, Robert C., Jr.
core   +2 more sources

POLYGNATHUS ROSAE N. SP. (CONODONTA) AND ITS BIOSTRATIGRAPHICAL CORRELATION POTENTIAL (LOWER EMSIAN, LOWER DEVONIAN)IN THE SPANISH CENTRAL PYRENEES

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2010
The problems around the Pragian/Emsian (P/E) boundary have been widely discussed by several authors, who have pointed out that the present Global Stratotype Section and Point (GSSP) in the Zinzilban section (Kitab Reserve, Uzbekistan), is much older than
CARLOS MARTÍNEZ-PÉREZ   +2 more
doaj   +1 more source

Devonian Sandstone Lithostratigraphy, Northern Arkansas [PDF]

open access: yes, 1977
Two areas of Devonian sandstone development may be recognized in northern Arkansas. In northwestern Arkansas, the Clifty Formation comprises a massively bedded, super mature quartz arenite of Middle Devonian age overlain by thinner bedded, phosphatic ...
Hall, Jeffery D., Manger, Walter L.
core   +2 more sources

Upper Kellwasser carbon isotope excursion pre-dates the F–F boundary in the Upper Devonian Lennard shelf carbonate system, Canning Basin, Western Australia [PDF]

open access: yes, 2015
Here we report four high-resolution carbon isotope records in addition to trace element data for the Frasnian–Famennian (F–F) boundary interval in the Lennard Shelf carbonate system of the Canning Basin, Western Australia.
Caulfield-Kerney, Samuel   +12 more
core   +1 more source

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