A geology of south Shropshire

Whittard, W. F.

doi:10.1016/s0016-7878(52)80015-x

Cited by 41 publications

(11 citation statements)

References 114 publications

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“…Thus bed has not been studied in detail, but the writers' observations are similar to those made by White (1950), Whittard (1952) and Allen (1963 a, 1963 b). The bed has the aspect of a winnowed, lag-type deposit, but may possibly represent a period of very slow sedimentation, or a condition of highiy toxic water which resulted in mass mortality of the fish population in the manner described by Brongersma-Sanders (1957) and Grindley and Taylor (1962).…”

Section: (I) Grey Downtoniatt or Temeside Groupsupporting

confidence: 61%

Stratigraphy and geological history of the Malvern, Abberley and Ledbury Hills

Phipps¹,

Reeve

1967

Geological Journal

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A revised stratigraphy of the Malvern, Abberley and Ledbury Hills is given. The Siiurian succession is considered in detail and shows a series of five major sedimentary rhythms or cycles between an initial Llandovery transgression and regression at the close of the Silurian period. The succession exhibits an alternation of shale with either limestones and/or temgenous clastics, and the rhythmic nature of the sequence suggests a periodic change in base level. A number of different lithological facies can be distinguished in the limestone formations, particularly in the Wenlock limestone. A detailed faunal list is given for most of the Silurian sequence. From the evidence of the stratigraphic succession, an attempt has been made to decipher the complex geological history of the area.

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Section: (I) Grey Downtoniatt or Temeside Groupsupporting

confidence: 61%

Stratigraphy and geological history of the Malvern, Abberley and Ledbury Hills

Phipps¹,

Reeve

1967

Geological Journal

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“…The Uriconian volcanic rocks lie unconformably beneath the Lower Cambrian quartzite (Allport 1877; Callaway 1877), and have therefore been assumed to be Precambrian (e.g. Callaway 1878; Pocock et al 1938 ;Whittard 1952;Dean 1968). The relationship between the Uriconian and Ercall Granophyre is less clear, as most known contacts are faulted (e.g.…”

Section: Introduction and Historical Backgroundmentioning

confidence: 99%

“…see discussion in Bonney 1879). However, apparent cross-cutting field relationships have favoured the conclusion that the granophyre is intrusive into, and therefore younger than, the Uriconian lavas and tuffs (Pocock et al 1938;Whittard 1952). The contact between the Ercall Granophyre and the Wrekin Quartzite has not previously been exposed.…”

Section: Introduction and Historical Backgroundmentioning

confidence: 99%

New evidence for the relative age of the Ercall Granophyre and its bearing on the Precambrian‐Cambrian boundary in southern Britain

Cope¹,

Gibbons²

1987

Geological Journal

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Recent extension of the Ercall Quarry, Shropshire, has revealed an unconformable contact between the Ercall Granophyre and overlying Lower Cambrian sediments. Five metres of basal conglomerate with rare granophyre clasts overlie a weathered granophyre surface and precludes the possibility that the granophyre is intrusive into the quartzite. The age of the Cambrian quartzite is reviewed and is considered to be most probably late Tommotian. The granophyre is therefore pre-late Tommotian, but has been radiometrically dated as 533 ? 13 Ma (Rb-Sr WR, Patchett ef al. 1980) and 531 t 5 Ma (U-Pb zircon, Compston ef al. in Cowie and Johnson 1985). If these independent dating methods are recording the age of granophyre intrusion, then the absolute ages of both the Comley Series Lower Cambrian faunas, and therefore the Precambrian-Cambrian boundary, are younger than is generally recognized.

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“…The westerly dipping succession consists of marine shelf sediments, intercalated with volcanic deposits. The continuously fossiliferous successions have drawn the attention of geologists ever since Murchison's time, and an overview of previous research on the area has been given in several papers by Whittard (1931Whittard ( , 1952Whittard ( , 1979.…”

Section: B the Shelve Inliermentioning

confidence: 99%

A modern assessment of Ordovician chitinozoans from the Shelve and Caradoc areas, Shropshire, and their significance for correlation

et al. 2008

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-New chitinozoan data are presented from the classical section along the Onny River in the type Caradoc area, and from the deeper-water sections in the Shelve area, including the former British candidate GSSP for the base of the Upper Ordovician Series. The rich and well-preserved chitinozoan fauna of the Onny River has been a standard for 40 years, but new data revise some of the identifications. The assemblages are now attributed to biozones that are more readily applicable for international correlation. The main part of the section can be interpreted as belonging to the originally Baltoscandian Spinachitina cervicornis Biozone, although this is uncertain in the lower part. Within this biozone, the Fungochitina actonica Subzone has been defined. The Onny Formation at the top of the section is equated with the Acanthochitina latebrosa-Ancyrochitina onniensis Biozone; contrary to earlier reports, Acanthochitina barbata is absent. The Lower Wood Brook and Spy Wood Brook section from the Shelve Inlier yielded a great number of moderately to well-preserved chitinozoans, but a low-diversity assemblage. Their ranges have been neatly positioned against the well-known graptolite stratigraphy in the area. A local Eisenackitina rhenana Biozone? has been recognized, allowing us to suggest some international correlations.

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A geology of south Shropshire

Cited by 41 publications

References 114 publications

Stratigraphy and geological history of the Malvern, Abberley and Ledbury Hills

Stratigraphy and geological history of the Malvern, Abberley and Ledbury Hills

New evidence for the relative age of the Ercall Granophyre and its bearing on the Precambrian‐Cambrian boundary in southern Britain

A modern assessment of Ordovician chitinozoans from the Shelve and Caradoc areas, Shropshire, and their significance for correlation

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