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Tirley PRI

10:57 Sep 15 2011 350m NE of Flat Farm, Tirley

Tirley PRI Tirley PRI Tirley PRI
Description
Mid brownish-red mudstone beds interposed with two pale greyish-blue mudstone layers. The weathered upper 300mm of the deposit contains a distinctive c. 100mm thick band of rounded, usually tabular limestone pebbles and occasional flint or quartz rounded pebbles; the underlying remainder of the deposit consists of ?laminated, poorly-structured mudstone material.

?(The form of the pale blue part of the deposit may suggest erosion or contortion of this part of the deposit prior to deposition of the overlying red material.) Fine bedding or banding – suggestive of erosion or method of deposition - is present within the blue layer.

- Image 0207 shows the overall east-facing exposed section through the red & blue mudstones;
- Image 0206 shows the same as 0207 but from above, emphasising the pebble layer within the weathered upper surface of the deposit.
- Image 0205 is a detail of the largely limestone pebble layer within the upper 300mm of the weathered mudstone deposit.
Additional Data
Status of the site/exposure: National Grid PRI construction site
County or district: Gloucestershire
National Grid Reference(s): SO 81845-29541
Date of record: Sep 08 2011
If a GeoExposure, until when will it be available?: Sep 30 2011
System/Period of rocks/sediments: Triassic
Group/Formation/Bed name: Mercia Mudstone Group
Width of observation (m): 2m
Height of observation (m): 1.8m
Submitted by: Andrew Hunn

Credibility: UP DOWN 0
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