PDF of contents and abstracts - SEPM
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PDF of contents and abstracts - SEPM
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SOIL DEVELOPMENT ON MODERN DISTRIBUTIVE FLUVIAL SYSTEMS:<br />
PRELIMINARY OBSERVATIONS WITH IMPLICATIONS FOR<br />
INTERPRETATION OF PALEOSOLS IN THE ROCK RECORD<br />
ADRIAN J. HARTLEY<br />
Department <strong>of</strong> Geology <strong>and</strong> Petroleum Geology, School <strong>of</strong> Geosciences, University <strong>of</strong><br />
Aberdeen, Aberdeen, AB24 3UE, UK<br />
e-mail: a.hartley@abdn.ac.uk<br />
GARY S. WEISSMANN AND PROMA BHATTACHARAYYA<br />
Department <strong>of</strong> Earth <strong>and</strong> Planetary Sciences, University <strong>of</strong> New Mexico, MSC03 2040, 1<br />
University <strong>of</strong> New Mexico, Albuquerque, New Mexico 87131-0001, USA<br />
GARY J. NICHOLS<br />
Department <strong>of</strong> Earth Sciences, Royal Holloway, University <strong>of</strong> London, Egham,<br />
Surrey, TW20 0EX, UK<br />
LOUIS A. SCUDERI<br />
Department <strong>of</strong> Earth <strong>and</strong> Planetary Sciences, University <strong>of</strong> New Mexico, MSC03 2040, 1<br />
University <strong>of</strong> New Mexico, Albuquerque, New Mexico 87131-0001, USA<br />
STEPHANIE K. DAVIDSON AND SOPHIE LELEU*<br />
Department <strong>of</strong> Geology <strong>and</strong> Petroleum Geology, School <strong>of</strong> Geosciences, University <strong>of</strong><br />
Aberdeen, Aberdeen, AB24 3UE, UK<br />
*Present address: EA4592 G&E, ENSEGID, Institut Polytechnique de Bordeaux, 1 allée Daguin,<br />
33 607 Pessac, France<br />
TAPAN CHAKRABORTY AND PARTHASARATHI GHOSH<br />
Indian Statistical Institute, 205 B.T. Road, Kolkata, India<br />
AND<br />
ANNE E. MATHER<br />
School <strong>of</strong> Geography, Earth <strong>and</strong> Environmental Sciences, Plymouth University, Drake Circus,<br />
Plymouth, PL4 8AA, UK<br />
ABSTRACT: Underst<strong>and</strong>ing <strong>of</strong> controls on the distribution <strong>of</strong> soils in modern sedimentary basins<br />
facilitates interpretation <strong>of</strong> paleosols in the rock record. Here, we present information on soil distribution<br />
from a number <strong>of</strong> modern distributive fluvial systems (DFSs) in sedimentary basins developed in<br />
different climatic <strong>and</strong> tectonic settings. DFSs form an important part <strong>of</strong> modern alluvial sedimentary<br />
basins, <strong>and</strong> an underst<strong>and</strong>ing <strong>of</strong> the controls on soil development in these settings should facilitate<br />
interpretation <strong>of</strong> the alluvial rock record. The studied areas include: the Pilcomayo <strong>and</strong> Bermejo DFSs in<br />
the Andean forel<strong>and</strong> <strong>of</strong> Argentina, the Tista DFS <strong>of</strong> the Himalayan forel<strong>and</strong> basin in northern India, <strong>and</strong><br />
the Okavango DFS developed in an intracontinental rift basin in Botswana. Soils in each <strong>of</strong> the examples<br />
are relatively immature <strong>and</strong> weakly developed. Where present, downdip changes (over distances >100<br />
km) from relatively well-drained, relatively dry soils in s<strong>and</strong>y proximal areas to more poorly drained,<br />
relatively wet soils in more distal, clay-rich areas can be recognized. In the Andean example, this change