TG1143 : Crag Geology

taken 7 years ago, near to Weybourne, Norfolk, Great Britain

Crag Geology
Crag Geology
The Cretaceous chalk is at the bottom, it contains some belemnite fossils.
The 'stone' bed is above, it is a traceable line of poorly sorted flints and pebbles along with mammal remains. The bed shows a quick marine transgression which washed away the smaller particles. Next is the Wroxham crag (pre glacial); a series of coarse cross bedded sands (in some cases) start the sequence. Next is bioturbated sand and clays that are interbedded. These show tidal areas in shallowish waters. After the energy increases near the shoreline coarse sands appear again, this can also indicate more river input. The crag shows this because there was a marine transgression event before sea level became stable. The basin here filled with sediment so the depth gradually decreased. On top of the crag is Quaternery deposits made up of glacial till.
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TG1143, 304 images   (more nearby )
Photographer
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Date Taken
Saturday, 10 September, 2011   (more nearby)
Submitted
Sunday, 11 September, 2011
Geographical Context
Geological interest 
Subject Location
OSGB36: geotagged! TG 1141 4365 [10m precision]
WGS84: 52:56.9136N 1:8.7202E
Camera Location
OSGB36: geotagged! TG 1144 4369
View Direction
Southwest (about 225 degrees)
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