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Topic: Paleogene

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In the News (Mon 15 Oct 18)

  Paleogene - Search Results - MSN Encarta
Paleogene Period, major division of the Cenozoic Era, spanning the interval from about 65 to 23 million years ago.
The Paleocene (Greek for “ancient”) Epoch of the Paleogene Period is the earliest epoch of the Cenozoic Era.
Geologists are most concerned with the epochs of the Cenozoic Era, which is the era we live in today.
ca.encarta.msn.com /Paleogene.html   (93 words)

 International Subcommission on Paleogene Stratigraphy (ISPS)
New Paleogene marsupials from the Amazonian basin, Southeastern Perú.
Lithofacies, Palynofacies, and Sequence Stratigraphy of Paleogene Strata in Southeastern Nigeria.
Continental Paleogene of Patagonia: stratigraphy, fossil vertebrates and flora, paleoclimates:
wzar.unizar.es /isps/southAmerican2004.htm   (7594 words)

 Informat.io on Paleogene
Paleogene (alternatively Palaeogene) period is a unit of geologic time that began 65 and ended 23 million years ago.
Lasting 42 million years, this period is most notable as being the time in which mammals evolved from small, simple forms into diverse animals in the wake of the mass extinction that ended the preceding Cretaceous Period.
The Paleogene follows the Cretaceous Period and is followed by the Miocene Epoch of the Neogene Period.
www.vacilando.eu /?title=paleogene   (262 words)

 Palaeos Cenozoic: The Paleogene Period
The Paleogene is divided into three epochs, the Paleocene, Eocene, and Oligocene.
General cooling and drying began before the end of the Oligocene, but was probably not a major factor until the middle Miocene.
The Paleogene might be thought of as an extension of the Mesozoic -- but with mammals.
www.palaeos.com /Cenozoic/Paleogene.html   (131 words)

 APPF References
Krasheninnikov, V.A. Zonal Stratigraphy of the Paleogene of the Eastern Mediterranean.
Zonal Stratigraphy of Paleogene in the Nile Valley: UAR.
Pearson, P.N. A lineage Phylogeny for the Paleogene Planktonic Foraminifera.
services.chronos.org /foramatlas/pages/biblio.htm   (3467 words)

 Warm Climates and Climate Transitions   (Site not responding. Last check: 2007-10-17)
The meeting on Early Paleogene Warm Climates and Bio-sphere Dynamics was held June 9 - 13, 1999, in Göteborg, Sweden, and was organized and hosted by B. Schmitz.
Of broad interest were the discussions and predictions of large-scale causes and consequences of climate change during the early Paleogene.
Meeting presentations and discussions revealed that the early Paleogene was a time of major biotic and climatic changes far more complex than previously realized.
www.es.ucsc.edu /~lcsloan/Lisa/lcswarm3.html   (1317 words)

 Paleogene Depocenter along the Northeast Margin of the Maracaibo Basin: Structure along an Exhumed, Eocene Age Lateral ...
Paleogene Depocenter along the Northeast Margin of the Maracaibo Basin: Structure along an Exhumed, Eocene Age Lateral Ramp Fault in the Maracaibo Basin, Western Venezuela, by Alejandro Escalona and Paul Mann, #30018 (2003).
Paleogene Depocenter along the Northeast Margin of the Maracaibo Basin: Structure along an Exhumed, Eocene Age Lateral Ramp Fault in the Maracaibo Basin, Western Venezuela*
An integrated reconstruction of the evolution of the Maracaibo basin during the Paleogene is summarized in Figure 4.
www.searchanddiscovery.com /documents/2003/escalona/index.htm   (1652 words)

We are going to construct integrated shelf to basins transects where we will integrate data on the distribution in time and space of carbonate facies (to constrain sea level changes and variability in biocalcification) with isotopic and geochemical data (to constrain ages via chemostratigraphy, and paleonvironmental changes).
During the Paleogene, carbonate environments witnessed the rapid diversification, maximum diversity and later extinction of larger benthic foraminifera.
In the early Paleogene, marine carbonate record a major excursion in Delta-13C, a 3o/oo shift (the largest in the Cenozoic), indicating major changes in the global carbon cycle.
www.geo.uni-potsdam.de /professuren/exogene_dynamik/AG_Mutti/Paleogene/Paleogene.htm   (643 words)

 26th GCSSEPM Bob F. Perkins Research Conference   (Site not responding. Last check: 2007-10-17)
The Paleogene earth was characterized by a set of processes and regional events that made it distinctly Paleogene.
Paleogene aspects of the Mexican basins: Laramide foredeep overprint on a passive margin; sediment dispersal systems from thrust front to basin.
Paleogene Canyon development, Mississippi to Campeche: tracing clastic sediments from source to sink; reservoir character and occurrence along the way; assessing the mechanism of canyon creation; arguments for and against the sea level evaporative draw-down hypothesis.
www.gcssepm.org /conference/2007_conference.htm   (817 words)

 Brian P. Coffey: Research
These Paleogene sediments are major aquifers, yet little is known concerning the facies distribution and diagenesis within the deeper portion of the basin.
A refined sequence stratigraphic model for the Paleogene mixed clastic-carbonate succession of the region will incorporate the wave-and ocean current-dominated setting, the widespread non-depositional, wave-abraded inner shelf (hardground), the near shore siliciclastic estuarine/lagoon/barrier systems, the echinoderm and bryozoan-rich outer shelf facies, and marine vs. fluvial incisional events into a non-tropical depositional framework.
The purpose of this study is to generate a high resolution sequence stratigraphic framework to document the stratigraphic signature showing climatic transition from greenhouse conditions of the early Eocene to the onset of icehouse conditions by the early Oligocene, as preserved in the strata of the southeast Atlantic Coastal Plain.
www.geol.vt.edu /gradstu/bcoffey/research.html   (1452 words)

 International Subcommission on Paleogene Stratigraphy (ISPS)
Paleogene shark fauna development at the West Siberian basin // Materials of International Symposia "Evolution life on the Earth".
Transuralian Paleogene stratigraphy and zonal scale correlation by microphytoplankton and ichtiofauna // Biostratigraphic criteria of the subdivision and correlation Ukranian Phanerozoi.
RAS, Moscow) Ð Biosphere crisis at the Cretaceous Paleogene boundary.
wzar.unizar.es /isps/russianPal2004.htm   (3023 words)

 Extreme warm climates introduction   (Site not responding. Last check: 2007-10-17)
The Cretaceous to Paleogene greenhouse climates provide past analogues to the present-day expected greenhouse conditions and allow the determination of biological, physical and chemical responses of the ocean-atmosphere system to rapid perturbations of the carbon cycle.
Cretaceous to Paleogene greenhouse climates Several fundamental questions remain unanswered as to the causes and effects of climatic extremes during the Cretaceous and Paleogene.
Drilling the Arctic frontier The only means of understanding Cretaceous to Paleogene climatic evolution at high latitudes is to core and recover an extensive sedimentary record from the Arctic Ocean, using the most appropriate drilling platform.
www.bgr.de /ecord/extreme_warmth/warmth.htm   (904 words)

 Naturhistorisches Museum - Science
This synthesis have relies on a sound biostratigraphic zonation, therefore the setup of a homogenous phylogenetic taxonomy of the Paleogene Larger Foraminifera is intended.
A new homogenous phylogenetic taxonomy of nummulites and also a detailed biostratigraphical zonation of the Paleogene based on nummulites aims to clarify the prevailing results of bio- and lithostratigraphical studies of Alpine pre-flysch sediments.
The "Couches à Cerithes" (Image 1, Image 2) appear in different stratigraphical levels of the paleogene Helvetic and Infrahelvetic pre-flysch formations of the Alps (Switzerland and Haute-Savoie, France).
www-nmbe.unibe.ch /deutsch/512_2.html   (283 words)

 Strata of Neogene and Paleogene (Tertiary) Age, Kentucky Geological Survey site   (Site not responding. Last check: 2007-10-17)
Paleogene and Neogene (also known as Tertiary Age, 65 to 1.6 million years ago) rocks and sediments were deposited after the dinosaurs became extinct, during the time called the Cenozoic Era.
A low grade of coal called lignite is also is also found in some areas of the Jackson Purchase, but the deposits are not currently economic to mine.
Neogene and Paleogene fossils are uncommon, but occur in western Kentucky.
www.uky.edu /KGS/geoky/tertiary.htm   (185 words)

The Tertiary Andean uplift from southern Mendoza to Neuquén provinces in Argentina is related directly to the evolution of volcanic arc activity and its associated Tertiary continental deposits developed in the retroarc.
The beginning of Tertiary uplift (Paleogene) took place in the southern segment and is characterized by a wide composition of volcanic rocks.
The age of this activity is Paleogene and the diastrophism is associated with the Incaica phase.
gsa.confex.com /gsa/2001CD/finalprogram/abstract_5164.htm   (288 words)

 Palaeogene of the Eastern Alps   (Site not responding. Last check: 2007-10-17)
The Paleogene was a period of dynamic global and regional changes.
The biotic development during the Paleogene was influenced by dramatic climatic and eustatic sea-level changes as well as by a remarkable incision at the Cretaceous/Paleogene boundary, which led to subsequent faunal and floral radiations.
In the Eastern Alps, the interplay of tectonic, atmospheric, and eustatic sea-level changes is expressed by changing distribution patterns of depositional environments during the Paleogene.
www.kfunigraz.ac.at /gepwww/forschung/palaeogen   (625 words)

 International Subcommission on Paleogene Stratigraphy (ISPS)
A working meeting on North Pacific Paleogene problems was held in In August 2005 in Sakhalin.
A field work was organizied to enable Russian and Japanese geologists (paleontologists and lithologists) to examine the key Paleogene sections of northeastern Kamchatka and North Japan (Hokkaido).
A comparative study of the Paleogene sections of different climatic belts may form a base for reliable correlation of these sections and subtropical and tropical biotic assemblages of the North Pacific.
wzar.unizar.es /isps/northPacific2004.htm   (375 words)

 Contributions to the Stratigraphy of the Paleogene. Luterbacher, Hans Peter 3-510-66042-0
The objective of this subcommission is to encourage research into the Paleogene by establishing working groups dealing with specific problems, in particular the agreement on an international set of stages and series defined by boundary stratotypes, and organizing general symposia and thematic meetings.
An understanding of the biota and climate and their changes during the Paleogene period is of particular interest, since they are transitional between the warm and equilibrated Cretaceous which ended abruptly with the mass ext inction at the Cretaceous/Paleogene boundary and the modern world.
Since the roots of the present-day biotic and climatic conditions date back to the Paleogene, the motto chosen for the Leuven Symposium on the Paleogene is “Preparing for modern life and climate”.
www.schweizerbart.de /pubs/books/es/njahrbfgeo-155023400-desc.html   (1127 words)

 Cretaceous-Paleogene basins of northeast Africa   (Site not responding. Last check: 2007-10-17)
A second reference area of late Cretaceous — early Paleogene basin inversion and subsequent formation of a new intrashelf basin is exposed along the Galala Mountains, representing the southernmost branch of the "Syrian Arc" deformation west of the Gulf of Suez.
Transitions between late Paleocene shallow-water ramp carbonates and deeper-water intrashelf marls further south are exposed along slope sections with breccias, slides, and slumps that support the facies interpretations of the neighbouring uplifts.
Schematic cross-section of the Late Cretaceous- Paleogene sedimentary sequences at the Galala Mountains to demonstrate the stratigraphic evolution along the uplifted area and the coeval basin-fill towards the south.
www.palmod.uni-bremen.de /FB5/geochron/basin_fill.htm   (1595 words)

 Eos/Indus Fan
Paleogene clastic sediments, presumed to be part of the paleo-Indus Fan system, have been found at several locations around the Arabian Sea.
Those parts of the Paleogene Indus Fan still present in that area are now buried under Neogene clastic sediment eroded from the Makran and Oman margins.
The existence of a Paleogene history to Indus Suture Zone and Tibetan uplift, both within the modern Indus Fan and in sections now uplifted on the Murray Ridge, is especially intriguing because of the lack of a well dated Paleogene record available in the Indian foreland, where the entire Oligocene appears to be missing.
www.whoi.edu /pclift/eostxt.html   (1827 words)

The Paleogene of the U.S. Gulf and Atlantic Coastal Plains has provided a molluscan database (40,000 specimens) from which we have derived a variety of testable hypotheses in evolutionary paleoecology.
In particular, the Paleogene naticid gastropod predator-prey system has served as a model for studying evolutionary dynamics, including the process of escalation.
Hypotheses generated for the Paleogene of the U.S. Coastal Plain can be tested by examining the record of naticid predation from other regions and times.
gsa.confex.com /gsa/2001SE/finalprogram/abstract_4327.htm   (399 words)

 Paleogene tropical Pacific: Clues to circulation, productivity, and plate motion
Sediment accumulation rates have been calculated for ten intervals ranging in age from 10 to 56 Ma and have been plotted for the midpoint of each interval at the associated paleoposition for each site used.
The development of this equatorial band is weakest between 46 and 56 Ma, the time of the peak warmth in Paleogene climate.
Possible motion of the Hawaiian hot spot or true polar wander between 46 and 56 Ma appears to have had little effect on the plate rotation estimate of the position of the equator.
www.agu.org /pubs/crossref/2004/2003PA000998.shtml   (390 words)

 Less ice, less tilt, less chill: The influence of a seasonally ice-free Arctic Ocean and reduced obliquity on early ...
Less ice, less tilt, less chill: The influence of a seasonally ice-free Arctic Ocean and reduced obliquity on early Paleogene climate -- Sewall and Sloan 32 (6): 477 -- Geology
Less ice, less tilt, less chill: The influence of a seasonally ice-free Arctic Ocean and reduced obliquity on early Paleogene climate
Paleogene climate with greater accuracy than any previous modeling
geology.geoscienceworld.org /cgi/content/abstract/32/6/477   (231 words)

 APPF Introduction
The consensus of the meeting was that a concerted effort among workers was needed to unravel conflicting taxonomic usages of Paleogene taxa due to misunderstanding and lack of access to type collections, particularly in the former Soviet Union.
In order to achieve a meaningful reconstruction of the taxonomy and phylogeny of Paleogene planktonic foraminifera the working group decided to focus on unraveling the origins and evolution of the earliest Paleocene (Danian) taxa so as to identify lineages of species which could be traced into the later Paleocene and ultimately through the Paleogene.
The use of planktonic foraminifera in biostratigraphy may be said to be an essentially post-World War II phenomenon (although there were several pre-war contributions of less than lasting value) which resulted from the recognition of their usefulness in local and regional biostratigraphic zonation and correlation.
services.chronos.org /foramatlas/pages/atxt.htm   (7199 words)

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