SO9391 : Nodular Limestone with bentonite layer

taken 3 years ago, near to Dudley, Great Britain

Nodular Limestone with bentonite layer
Nodular Limestone with bentonite layer
At a quarry on the west side of Wren's Nest, a good insight can be had into the internal structure of the Nodular Limestone Member. Here thicker limestone layers alternate with thin bands of sandstone. The limestone is a deposit from shelly organisms living in a shallow shelf sea, while the sandstone is terrigenous, i.e. has been transported here by rivers after flooding events on nearby land. Amongst this, there are two thin and very crumbly layers. These are made up of bentonite, a clay deposit originating from volcanic ash. The shelly creatures clearly had to contend with quite a lot of environmental pressure, but the fact that limestone layers follow after each sandy or volcanic bed shows that they have been able to cope. Geologist's head shown for scale.
Geology of Wren's Nest, Dudley
See this Geograph article LinkExternal link about the geological history and limestone mining at Wren's Nest.
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SO9391, 75 images   (more nearby )
Photographer
  (find more nearby)
Date Taken
Sunday, 8 June, 2014   (more nearby)
Submitted
Monday, 25 August, 2014
Geographical Context
Geological interest  Quarrying, Mining  Park and Public Gardens 
Primary Subject of Photo
Rock 
Subject Location
OSGB36: geotagged! SO 9351 9173 [10m precision]
WGS84: 52:31.4044N 2:5.8250W
Camera Location
OSGB36: geotagged! SO 9350 9173
View Direction
EAST (about 90 degrees)
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