The Oxford English Dictionary defines Stratigraphy as ‘The branch of geology concerned with the order and relative position of strata and their relationship to the geological timescale’.

Stratigraphy is one of the key elements of geology and provides the basis for the subdivision of rock strata. This subdivision can be on the basis of rock type (lithostratigraphy), fossil content (biostratigraphy) or absolute age (chronostratigraphy).

The basic concept of stratigraphy was established by Nicholas Steno in the late 17th century and was developed by geologists such as William Smith and contemporary workers in the first half of the 19th century who laid down the basis for the approach to stratigraphy that is employed today.

A progressive refinement of the stratigraphy of the British Isles has occurred overtime and this continues as further research provides additional information and a more refined stratigraphic column.

Whilst identifying and recording Local Geological Sites (LGS) Cumbria GeoConservation has followed a well-established and accepted regional lithostratigraphy that has been developed over the past 200 years, starting with the 3 fold division of the geology of the central Lake District (‘the Clayslate, Greenstone and Greywacke’) described by Jonathan Otley in 1820 and culminating in detailed work currently being undertaken by UK Universities and the British Geological Survey.


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In order to ensure consistency of approach Cumbria GeoConservation has chosen to follow the lithostratigraphy detailed in the latest BGS Regional Guide for the North of England (Stone et al, 2010).  This lithostratigraphy is summarised  in a number of tables that have adapted the information provided in the regional guide.  These tables aim to cover all of the solid geology of Cumbria.  Some of our Local Sites were designated more than 25 years ago and the lithostratigraphic information may now be out of date – this will be updated as individual sites are reviewed.  The tables are as follows;

Ordovician - Skiddaw Group

Ordovician – Borrowdale Volcanic Group (representative section only)

Ordovician to Silurian – Windermere Supergroup

Devonian

Carboniferous

Permian/Triassic/Jurassic

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Download each summarised Stratigraphic Table for Cumbria by clicking on the table name on the left hand side.

An excel version of all tables is attached here.

It should be noted that whilst for some elements of the stratigraphic column (e.g. the Permian/Triassic/Jurassic) the lithostratigraphy is relatively simple, sequences such as the Carboniferous are more complex; reflecting the varying nature of sedimentation in both time and space, but it is still possible to satisfactorily represent the whole region on one table.  However, the Borrowdale Volcanic Group can exhibit such extreme lateral and vertical variation over small distances that it is not practical to represent the whole of the Lake District on a single table.  In this case a representative section from a specific local area has been provided.

Reference

STONE, P, MILLWARD, D, YOUNG, B, MERRITT, J W, CLARKE, S M, McCORMAC, M, and LAWRENCE, D J D, 2010.  British Regional Geology: Northern England (Fifth edition). (Keyworth, Nottingham: British Geological Survey).

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Wednesday, August 14th, 2019 at 9:19pm
SAVE THE DATE: 29th February 2020-CBDC Recorders' Conference. New date will allow everyone time to process 2019 records and provide an opportunity for "hot off the press" reports and presentations. We haven't decided a theme yet...but the date is triggering a few ideas. https://t.co/YJnV1kh5Ev CumbriaBDC photo
Monday, August 12th, 2019 at 10:42pm
Join @NorthPennAONB's FREE #bee walk with @StevenFalk1, Sun 1 Sept at Langdon Beck & Harwood-in- #Teesdale Special #Invertebrate Sites. Late flowering species = fantastic habitat for #bumblebees, solitary bees & more. Beginners welcome. Booking essential: https://t.co/UM9MLLWlUY https://t.co/hSlNm8EKzm CumbriaBDC photo
Sunday, August 11th, 2019 at 10:21pm
@solwaywalker Thanks Ann. Sending it to me is a start we will add it to the Cumbria records. If you have any other records for the Solway I can add them to our List. The volunteers we recruited last year wanted to focus on plants so we are still short on shore data.
Sunday, August 11th, 2019 at 8:46pm
@solwaywalker @TurfPix Not a commonly recorded fish - NBN atlas shows a couple of records just off the Silloth coast. CBDC does not have records for this species (not that we get much marine data). Will you be sending your record off to anyone? Debs