Sedimentary basins. Evolution, facies and sediment budget / Осадочные бассейны. Эволюция, фации и состав отложений

Sedimentary basins are, in a very broad sense, all those areas in which sediments can accumulate to considerable thickness and be preserved for long geological time periods. In addition, there also exist areas of long-persisting denudation, as well as regions where ero-sional and depositional processes more or less neutralize each other (creating what is known as non-deposition or omission).

In plan view sedimentary basins can have numerous different shapes; they may be approximately circular or, more frequently, elongate depressions, troughs, or embayments, but often they have quite irregular boundaries. As will be shown later, even areas without any topographic depression, such as alluvial plains, may act as sediment traps. The size of sedimentary basins is highly variable, though they are usually at least 100 km lone and tens of km wide.

i distinguish between (1) active sedimentary inil accumulating sediments, (2) inactive, but  wfmned sedimentary basins showing more or i .си ongmel shape and sedimentary fill, and (3) igh de’ormcd and incomplete fonner sedimentary i here the original fill has been partly lost to .и foi example in a mountain belt. h'ihx workers have pointed out, the regional de-eon of sediments, non-deposition, or denudation of locks aie controlled mainly by tectonic moveHi nec, most of the recent attempts to classify таи basins have been based on concepts of <...>