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Journal Article
Published: 01 April 1997
Journal of the Geological Society (1997) 154 (2): 209-223.
... eastward towards the Malvern Line. Lower Silurian sequences thin southward before thickening again, particularly across WNW-striking faults. The resulting Usk Basin, underlying the Usk Inlier, has ill-defined margins, but some additional N-S fault control. The Fownhope-1 and Usk-1 wells indicate that rapid...
Journal Article
Published: 01 May 1967
Geological Magazine (1967) 104 (3): 274-283.
...R. L. Austin; M. G. Bassett Abstract A conodont fauna from a thin limestone bed, considered to be of Wenlockian age, in the Usk inlier, Monmouthshire, is described. Ninety-seven specimens are assigned to four genera and eight species. The fauna is referable to the sagitta conodont zone...
Journal Article
Published: 01 November 1954
Geological Magazine (1954) 91 (6): 519.
...A. Hubert Cox Abstract It is recorded that the monchiquite intrusion near Usk, Monmouthshire, southern Wales, formerly seen only in a very small outcrop, has been exposed by the opening of a quarry for road material. The new and larger exposures demonstrate the similarity of the monchiquite...
Journal Article
Published: 01 January 1921
American Mineralogist (1921) 6 (1): 3-4.
...T. L. Walker Abstract Some samples of bornite recently obtained from an auriferous copper prospect near Usk, B. C., exhibit an unusually perfect cleavage. Generally this mineral presents only traces of octahedral cleavage, but in the specimens referred to the cleavage was almost as perfect...
Journal Article
Published: 01 January 2016
American Mineralogist (2016) 101 (1): 175-180.
Journal Article
Published: 01 December 1990
Bulletin of the Seismological Society of America (1990) 80 (6B): 1818-1832.
Series: GSA Special Papers
Published: 01 April 2011
DOI: 10.1130/2011.2476(08)
... approach to reconstructing floodplain sedimentation rates in the Olway-Usk Valley system in South Wales, which is a tributary to the Severn Estuary, a coastal feature of global importance because it has the world's second highest tidal range. Archaeological and radiocarbon-dated horizons within alluvium...
Series: Geological Society, London, Special Reports
Published: 01 January 2011
DOI: 10.1144/SR26.6
EISBN: 9781862396944
... the Newent, Forest of Dean and Severn coalfields and the Cannington Park inlier along the axis of the syn-Westphalian Usk Anticline. It is not clear if the Coal Measures were deposited and subsequently removed by erosion during late Bolsovian to early Asturian deformation or were never deposited at all...
Journal Article
Published: 01 August 1990
Journal of the Geological Society (1990) 147 (4): 675-686.
... interpreted as the deposits of shelf and basin environments, and those of the lower Downton Group as near-shore to beach. Sections sampled from the ‘shelf’ area are in the Ludlow type area, and in the Usk, May Hill and Woolhope inliers. ‘Basin’ sediments were sampled at Knighton, the Long Mountain, Capel...
Journal Article
Published: 01 December 1988
Journal of the Geological Society (1988) 145 (6): 901-914.
... to the Devonian and possibly earlier. Late Dinantian (Holkerian) facies distribution reflects uplift and emergence on the north-south Usk Anticline and Malvern Lineament. Continued uplift is recorded in Silesian sequences in south-east Wales and the Bristol-Mendips area. The orientation of structures bordering...
Journal Article
Published: 01 November 1978
Quarterly Journal of Engineering Geology and Hydrogeology (1978) 11 (4): 325-333.
... and faulted by movements which may have been as late as the Miocene. Silurian rocks which occur in the Usk and Rumney Inliers consist of sandstones, siltstones and shales (often calcareous) as well as some limestones. The argillaceous rocks often weather deeply and degenerate to clay with rock lithorelicts...
Journal Article
Published: 01 July 1958
Geological Magazine (1958) 95 (4): 328-332.
...H. C. Squirrell Abstract The Woolhope inlier, near Ledbury, Wales, has several zones of fragmentary beds in the Ludlovian (Silurian) strata that have yielded thelodont and acanthodian denticles. Thelodont remains have also been found in the Usk and Lye inliers at the base of the Dayia shales...
Journal Article
Published: 01 January 1957
Geological Magazine (1957) 94 (1): 54-57.
...V. A. Eyles; C. R. K. Blundell Abstract The monchiquite intrusion traversing Devonian sandstone exposed in a quarry near Usk in Monmouthshire, England, is associated with an agglomerate-filled vent. Fossiliferous blocks in the agglomerate are evidence that volcanic activity occurred not earlier...
Tectonic framework of the Welsh Basin during the Ordovician–Silurian as con...
Published: 19 July 2013
– Denbigh Trough; SB – Skomer Basin; W-UB – Woolhope-Usk basin. Key to major intra-basinal highs: BD – Berwyn Dome; HD – Harlech Dome. Key to tectonic lineaments: B – Benton Fault; BL – Bala Lineament; CWL – Central Wales Lineament; LF – Llanelidan Fault; LL
( a ) Late Ordovician–early Silurian tectonic setting of the host rocks of ...
Published: 01 September 2011
Disturbance. Key to major depocentres: CWB, Central Wales Basin, DT, Debigh Trough; SB, Skomer Basin; W-UB, Woolhope–Usk Basin. Key to intrabasinal highs: BD, Berwyn Dome; HD, Harlech Dome. Also shown is the position of the Variscan Front (VF), which may telescope earlier basinal configurations in South Wales
Journal Article
Published: 28 January 2019
Quarterly Journal of Engineering Geology and Hydrogeology (2019) qjegh2017-125.
... in groundwater level in USK-7 and USK-5, of 230 m and 120 m, respectively. Total discharge increased to almost 1200 l s −1 in the Camlidere section, at the point where the excavation reached 4000–5000 m downstream. Despite the additional ingress, the total discharge decreased over time with advanced grouting...
FIGURES | View All (13)
Journal Article
Published: 01 April 1974
Journal of the Geological Society (1974) 130 (2): 151-156.
.... W. Resource supply and species diversity patterns Lethaia 1971 4 51 61 Walmsley V. G. The geology of the Usk inlier (Monmouthshire) Q Jl geol Soc Lond 1959 114 483 521 Yonge C. M. Life and environment on the bed of the sea Adv Sci 1961 18 383 Ziegler...
Series: Geological Society, London, Special Publications
Published: 01 January 2019
DOI: 10.1144/SP471.6
EISBN: 9781786204103
... thickness of the ORS in Usk-1 and may indicate less burial. In estimating the maximum thickness beneath the Oxfordshire Basin, an interval velocity of 3900 m s −1 has been used, which equates to around 3000 m of ORS. Fig. 9. Form-line time–structure map on the Shelveian Unconformity, indicating...
FIGURES | View All (15)
Journal Article
Published: 01 December 2015
Mineralogical Magazine (2015) 79 (7): 1865-1866.
... arrell H enry A nthony K ampf K ari K ojonen F rantišek L aufek I an M a C allum J onas M azeika G iovanni M ongelli G raham P earson J ohn R akovan B rian R usk J ochen S chlüter J ames S coates M artin S mith T homas S...
Journal Article
Published: 01 February 1996
Journal of the Geological Society (1996) 153 (1): 151-162.
.... The buried channel and superficial deposits of the lower Usk and their correlation with similar features in the lower Severn Proceedings of the Geologists' Association 1968 79 325 348 Wills L. J. The Pleistocene development of the Severn from Bridgnorth to the sea Quarterly Journal...