17-Dec-2009 00:00 | Comments: 0 | Categories:

This is the site I was talking about today when walking above Blewbury.

Wasn’t that easy to navigate and find the map, but try this

Click anywhere and you get a description of the bedrock.

The green at Harwell (where it says A34)

UPPER GREENSAND FORMATION - CALCAREOUS SANDSTONE AND SILTSTONE

South of Blewbury, from where it says A417

Darker Green HOLYWELL NODULAR CHALK FORMATION - CHALK

Lighter Green ZIG ZAG CHALK FORMATION - CHALK

Yellowish WEST MELBURY MARLY CHALK FORMATION - CHALK

Pinkish WEST MELBURY MARLY CHALK FORMATION – CHALK (seems like the same to me)

Well done to spot the transition from Holywell to Zig Zag

Idioms like all chalk and no greensand come to mind.

David Marsh Digital Safaris

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