 |
Schofield, D.I.
(2009).
What's in the Welsh Basin?: insights into the evolution of Central Wales and the
Welsh Borderlands during the Lower Palaeozoic. 17pp.
|
 |
Donovan, S.K.
(2009).
Silurian crinoids from Dudley to Wenlock Edge. 2pp.
|
 |
Voyce, K.J.
(2009).
Groundwater Management: the Shropshire Groundwater Scheme. 10pp.
|
 |
Francis, K. (2009).
New thoughts on the Origins of Downton Gorge. 12pp.
|
 |
Jenkinson, A., Pannett, D., Thomas, G.S.P. &
Rosenbaum, M.S. (2009).
Field Meeting Report: Glacial Landscapes around Llangadfan, Powys, led by Andrew
Jenkinson and David Pannett, 16th May 2009. 5pp.
|
 |
Rosenbaum, M.S. (2009).
Field Meeting Report: Geological sites in the vicinity of Telford, led by David
C Smith, 22nd August 2009. 9pp.
|
 |
Complete volume, p.1-55
|
|

[6.460
MB] |
Schofield, D.I.
(2009).
What's in the Welsh Basin?: insights into the evolution of Central Wales and the
Welsh Borderlands during the Lower Palaeozoic. 17pp.
The British Geological Survey (BGS) has a long history of
geological study in the Welsh Basin starting in the mid 19th
century under the directorship of Sir Henry Thomas de la Beche, founder of the
Geological Survey of Great Britain, and subsequently under Sir Roderick Impey
Murchison who had earlier undertaken pioneering stratigraphic studies in the
area, at the same time as the Reverend Professor Adam Sedgwick.
During the first half of the 20th century, geological studies in the
region were led by Professor O.T. Jones. By 1912 he had proposed an overall
structure for the region, within which sediments had been transported from an
uplifted area underlying much of England into the deep water of the Welsh Basin.
Together with his colleague and lifetime friend, W.J. Pugh, who subsequently
became director general of the Geological Survey they identified extensive
volcanic activity around Builth Wells.
The current phase of work by the BGS started in the mid 1980's
and has largely been driven by the requirement to complete 1:50,000 scale
geological map coverage of Wales and the Welsh Borderlands. High quality
academic studies have been conducted in the area and the results need to be
integrated with the Survey's
mapping. This new phase commenced with a transect across the central part of the
Welsh Basin in the Rhayader and Llanilar districts, aiming to establish a
workable stratigraphy for the turbidite sequences within the basin informed by
new concepts on deep marine sedimentology, sequence stratigraphy and the
relationship between depositional facies, eustacy and tectonics.
|
|

[0.180
MB] |
Donovan, S.K.
(2009).
Silurian crinoids from Dudley to Wenlock Edge. 2pp.
It is an unproven assumption that the crinoid debris found in the Much Wenlock
Limestone Formation of Wenlock Edge represents similar, probably the same,
species as are known from the Wren's
Nest. This assumption is being tested by comparing the well preserved crinoids
of Dudley with the disarticulated plates found on Wenlock Edge. Some congruence
is found, demonstrated by reference to the cladid crinoid Gissocrinus spp.
|
|

[1.078
MB] |
Voyce, K.J.
(2009).
Groundwater Management: the Shropshire Groundwater Scheme. 10pp.
Shropshire's
water is dominated by the River Severn catchment. This covers a huge area and is
responsible for supplying much of the West Midland's
water needs. The Environment Agency is responsible for the operation and
development of the Shropshire Groundwater Management Scheme (SGMS). Located
solely within North Shropshire this is the largest of the UK's
groundwater regulation projects. SGMS has grown to include 50 groundwater
abstraction boreholes linked to a series of underground pipes that discharge
into the River Severn. The scheme employs boreholes to abstract groundwater for
supply and others which are drilled to establish geological formations and to
enable decisions to be made regarding the availability of water. The scheme has
six development areas and is being constructed in eight stages. At the present
time, four phases have been completed and the fifth is underway.
The SGMS is designed to be used, on average, once
every three years to meet peak dry weather demands for water. Water is pumped
from groundwater reserves naturally stored within the North Shropshire
Permo-Triassic Sandstone formations and released in conjunction with surface
water reservoir releases to balance the demands of abstractors while safe
guarding the ecological needs of the river environment. |
|

[4.129
MB] |
Francis, K.
(2009). New thoughts on the Origins of
Downton Gorge. 12pp.
With access to the latest Ordnance Survey height data and
using Global Mapper to produce profiles, new evidence has been found
which suggests a pre-glacial period of drainage reversal in the vicinity of
Downton Gorge. The overflow point for Glacial Lake Wigmore is shown to have been
further east than previously thought, and actually within the area now
containing the gorge.
|
|

[0.274
MB] |
Jenkinson, A.,
Pannett, D., Thomas, G.S.P. & Rosenbaum, M.S.
(2009).
Field Meeting Report: Glacial Landscapes around Llangadfan, Powys, led by Andrew
Jenkinson and David Pannett, 16th May 2009. 5pp.
The relation between bedrock geology and landscape has
been demonstrated, considered and discussed along the valley of the Afon Banwy,
between Llanfair Caereinion and Llangadfan, Powys. The Ordovician-Silurian
turbidite bedrock has been folded into two broad synclines separated by an
anticline, partially offset by NW-SE trending faults. The distribution of weak
and strong sedimentary beds has controlled the etching by erosion of an ancient
land surface, widely developed throughout central Wales. This basic landscape
has been modified by a series of Quaternary ice ages and their aggressive
glacial and periglacial weathering regimes.
|
|

[1.482
MB] |
Rosenbaum, M.S.
(2009). Field Meeting Report: Geological
sites in the vicinity of Telford, led by David C Smith, 22nd August 2009. 9pp.
A number of geologically interesting sites in the
vicinity of Telford were visited in order to demonstrate the diversity of
features recorded within designated RIGS. The sites included: Blockleys Brick
Pit (Upper Carboniferous), St George's Church Oakengates (Upper Carboniferous),
St Michael's Church Lilleshall (Cambrian; Upper Carboniferous), Duke of
Sutherland's Monument Lilleshall (Uriconian Precambrian; Upper Carboniferous),
Colliers Side Quarry associated with Lilleshall Limestone Mines (Upper
Carboniferous), and Great Bolas (Permian/Triassic unconformity).
|
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[13.542
MB] |
Complete volume, p.1-55
All papers.
|