Results 91 to 100 of about 34,573 (203)

Novel insect leaf-mining after the end-Cretaceous extinction and the demise of cretaceous leaf miners, Great Plains, USA.

open access: yesPLoS ONE, 2014
Plant and associated insect-damage diversity in the western U.S.A. decreased significantly at the Cretaceous-Paleogene (K-Pg) boundary and remained low until the late Paleocene. However, the Mexican Hat locality (ca.
Michael P Donovan   +4 more
doaj   +1 more source

Morphology, affinities and phytogeographic history of Porosia Hickey in the Cretaceous and Paleocene of North America and Asia

open access: yesActa Palaeobotanica, 2014
Morphology and anatomy of the extinct angiosperm fruit, Porosia verrucosa (Lesqueruex) Hickey, are documented in detail based on various modes of preservation including molds, casts, and permineralizations from more than seventy localities in the late ...
Manchester Steven R., Kodrul Tatyana M.
doaj   +1 more source

Resolving the relationships of Paleocene placental mammals.

open access: yesBiological reviews of the Cambridge Philosophical Society, 2015
The 'Age of Mammals' began in the Paleocene epoch, the 10 million year interval immediately following the Cretaceous-Palaeogene mass extinction. The apparently rapid shift in mammalian ecomorphs from small, largely insectivorous forms to many small-to-large-bodied, diverse taxa has driven a hypothesis that the end-Cretaceous heralded an adaptive ...
Halliday, TJD, Upchurch, P, Goswami, A
openaire   +3 more sources

Impact ejecta at the Paleocene-Eocene boundary

open access: yesScience, 2016
An impactful event Glassy silica spherules have been found in marine sediments from three sites across a wide area off the Atlantic coast of the United States, near the stratigraphic level of the Paleocene-Eocene boundary.
Schaller, Morgan   +4 more
openaire   +4 more sources

UPPER CRETACEOUS AND PALEOCENE IN ZANSKAR RANGE (NW Himalaya)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2020
A detailed Upper Cretaceous/Paleocene stratigraphic section was measured from the Spanboth Chu Valley, High Himalaya Nappes. Placement Of the Cretaceous—Tertiary boundary was refined, but some uncertitudes still remain because of poor exposure in this ...
MAURIZIO GAETANI   +5 more
doaj  

Magnetostratigraphy of the Hell Creek and lower Fort Union formations in northeast Montana [PDF]

open access: yes, 2010
Magnetostratigraphic evaluation of a well-exposed stratigraphic section in northeast Montana has been undertaken to expand upon and better understand the timing of the deposition of Hell Creek and Fort Union Formations.
LeCain, Rebecca
core   +2 more sources

PALEOCENE-MIDDLE MIOCENE FLEXURAL-MARGIN MIGRATION OF THE NONMARINE LLANOS FORELAND BASIN OF COLOMBIA Migración de la subsidencia flexural durante el Paleoceno-Mioceno medio en la cuenca de antepais de los Llanos Orientales de Colombia

open access: yesCT&F Ciencia, Tecnología & Futuro, 2007
A foreland basin is a dynamic system whose depositional systems migrate in response to changes in tectonic uplift patterns, sedimentary filling processes and isostatic rebound of the lithosphere. The Paleocene-middle Miocene foreland system of the Llanos
German Bayona   +4 more
doaj  

Paleocen vid Klagshamn [PDF]

open access: yesGeologiska Föreningen i Stockholm Förhandlingar, 1907
N. O. Holst, Karl A. Grönwall
openaire   +1 more source

Substantial continental temperature rise over the Paleocene-Eocene Thermal Maximum in the Pyrenees

open access: yesCommunications Earth & Environment
The Eocene period experienced several hyperthermal events with the Paleocene-Eocene Thermal Maximum being the most significant. During this event, global mean surface temperatures were 5–6 °C higher and latitudinal temperature gradients were reduced ...
Gábor Újvári   +10 more
doaj   +1 more source

CORAL CARBONATE PRODUCTION DURING THE PALEOCENE: INSIGHTS FROM THE MAIELLA MASSIF (PENNAPIEDIMONTE, CENTRAL ITALY)

open access: yesRivista Italiana di Paleontologia e Stratigrafia
The succession of the Maiella massif is analyzed, focusing on the colonial-coral bearing deposits occurring just below and immediately above the Cretaceous/Paleogene boundary.
Giovanni Coletti   +11 more
doaj   +1 more source

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