seqstrat_lst
Differences
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| //A sequence boundary marked in red by an unconformity on the shelf and a correlative conformity on the slope and basin floor. It is overlain at the base of the slope by Lowstand Fans (yellow) and across the slope by the Lowstand Wedge (brown, prograding sediments). Coastal sediments (pale yellow) updip of the wedge also prograde basinwards. The green surface is the MRS (see below).// | //A sequence boundary marked in red by an unconformity on the shelf and a correlative conformity on the slope and basin floor. It is overlain at the base of the slope by Lowstand Fans (yellow) and across the slope by the Lowstand Wedge (brown, prograding sediments). Coastal sediments (pale yellow) updip of the wedge also prograde basinwards. The green surface is the MRS (see below).// | ||
| + | As lowstand sediments build out into the basin they may be " | ||
| + | Because sea levels are now relatively static and sedimentation is continuing, the prograding sediments essentially raise the level of the sea-floor reducing accommodation space. Organisms that inhabit the bathyal slope floor progressively show shallower and shallower characteristics as this happens so that, in a vertical section, there is a shallowing-upwards trend in the fossil assemblages. | ||
seqstrat_lst.1679322622.txt.gz · Last modified: 20/03/2023 14:30 by mike_gss