Monday 16 March 2015

Test list

This is a test to see if it is easy to edit a doc in blogger and surface it on the web

Friday 17 May 2013

The Geology of Britain

Peter Toghill (2000) Crowood Press

This was the book which started it all off for me. I read this book back in 2005 and all the references to diagrams from S236 Historical Geography from the Open University sent me straight through their (virtual!) doors. This book suffers from the same problem as a lot of geology books in that it sometimes reads like a shopping list. That aside it is a good overview of British geology.


Tuesday 23 April 2013

OUGS - Castleton

The Yorkshire Branch trip to Castleton was led by Tony Felski on a fine and dry day with only myself and 3 others attending. This made for an intimate and friendly group. We met by the bus stop at the Blue John Cavern at 10 and started by looking at Mam Tor.

View of the ridge

Mam Tor

Close up of turbidite sequences

To the right, the main part of Mam Tor are the Mam Tor beds which are turbidite sequences, part of the Millstone Grit series. To the left are the Edale Shales which are older and lie directly on the limestone (below).
Edale Shale

Building the road on top of the Edale Shales was probably the main reason that it slipped beyond repair. The landslip is still active today and we saw the front of the landslip later.

Old road

From here we walked down the old road to Odin Gorge. Here a large lead vein was mined at the surface.

Near the Odin Mine crushing circle is the front of the landslip.

Front of landslip

Around these area small pieces of Blue John, galena and baryte can still be found.

Walking from Castleton towards Winnats Pass we saw lava and beach beds.


Beach beds in the Speedwell Mine carpark

Front of reef

On the way the sun was shining so I took this view up Winnats Pass earlier in the day.

What a view!

We walked up the reef observing the change in dip. The beach beds (aka Apron Reef) had a dip of about 25 degrees while the forereef was 35 degrees. The slope evened out at the reef top and sloped backward in the back reef. Finally in the lagoon the beds are flat, although they are mostly covered in sediment now.

The final stop was at Windy Knoll where we saw algal deposits, bitumen and a neptunian dyke.

Algal deposits form the reef

Now you see it, now you don't. A Neptunian Dyke.

Another great view!

Bitumen at the top of the knoll

Thursday 11 April 2013

Northern England (Regional Geology Guides) Fifth Edition

P. Stone, D. Millward and B. Young (2010) British Geological Survey

No look at the geology of the Peak District is complete without looking at the associated geology of northern England. This is the newest of the Regional Geology Guides and is crammed full with colour pictures and rainbow coloured sections and sequences. Like the other guides it's not one to read cover to cover - a veritable phone book of names, stick to the introductory bits. The Carboniferous is well represented in Northumberland so this is the most relevant chapter to the Peak District. 

Monday 8 April 2013

Scarp slopes in the snow

Snow has picked out the scarp slopes looking from the western end of Millstone Edge towards Higger Tor.


Millstone Edge

Millstone Edge truly is a graveyard for old millstones.