Desert Sediments: Ancient and Modern (Geological Society by L. E. Frostick, I. Reid

By L. E. Frostick, I. Reid

Show description

Read or Download Desert Sediments: Ancient and Modern (Geological Society Special Publication No. 35) PDF

Similar geology books

Encyclopedia of Sediments & Sedimentary Rocks

This finished, one-volume encyclopedia covers the sedimentological points of sediments and sedimentary rocks. It gains greater than 250 entries by means of a few one hundred eighty eminent participants from around the world, very good indices, pass references, and broad bibliographies.

Geological hazards: their assessment, avoidance, and mitigation

This ebook is an advent to dangers and man-made risks that have implications for engineering geology. It examines risks akin to seismic results, volcanoes and floods, and with subsidence, waste disposal and floor water pollutants. Geological dangers is a vital booklet for pro engineers in civil, geological and making plans components around the world.

Submarine massflow sedimentation: computer modelling and basin-fill stratigraphy

Turbidite sandstone successions are universal parts of the stratigraphic content material of sedimentary basins, and are vital hydrocarbon reservoirs in lots of components of the area. This ebook addresses the real factor of mass-flow sedimentation modelling within the framework of basin-fill dynamics and series stratigraphy.

Fractal and chaotic properties of earthquakes

This e-book offers with the appliance of fractal and nonlinear time-series research to seismicity and earthquakes in the framework of earthquake prediction examine. Emphasis is on theoretical foundations in addition to functional implementation and pitfalls to permit readers to behavior their very own analyses.

Additional info for Desert Sediments: Ancient and Modern (Geological Society Special Publication No. 35)

Example text

P A W R borehole records (Aube11983; Jones 1986) suggest that buried gravels extend to depths of up to 285 m in some places, although these gravels also include the continental alluvial sediments of the Mio-Pliocene Upper Fars Group. This fan system slopes gently towards the S and SE with gradients decreasing from c. 0030 m m - ~ W of Barzaman (Fig. 3) to only c. 0018 m m - 1 in the SE, near the confluence of the Wadis Andam and Matam. Fan System H forms a narrower, more recent channel system confined to the northerly, proximal parts of the present Wadi Andam piedmont zone (Fig.

This approach requires the field determination of maximum particle sizes, in order to provide a measure of bed roughness, former channel gradients, and former flow widths. The main assumptions of this critical shear stress approach are the former existence of steady uniform flow; the validity of the s h e a r stress model itself; a known effect of packing and imbrication on the Shields coefficient; the absence of local bedforms or coarse clast concentrations; and the availability of all particle sizes for transport by competent Newtonian fluid flows (eg see Costa 1984).

The onset of aridity was probably very rapid (Neev & Emery 1967; Begin et al. 1974; Danin et al. 1982; Gerson 1982a). The lower terrace group contains mostly fluviatile sediments exhibiting features consistent with overall net incision, and rather infrequent large floods depositing coarse gravel. Most of the Holocene deposits indicate events of a similar nature to those in Pleistocene deposits. However, in the latter there is a distinct alternation between beds of differing sedimentary texture, with abrupt transitions between units.

Download PDF sample

Rated 4.48 of 5 – based on 22 votes