New Evidence on the Correlation of the Lower Carboniferous Reefs at Castleton, North Derbyshire

Ford, Trevor D.

doi:10.1017/s0016756800067947

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…Shirley and Horsfield (1940) were the first to postulate that the dips of up to 45 degrees on Treak Cliff were depositional, in order to satisfy their interpretation of the limestones as a " submarine scree ". A similar view was taken by Bond (1950a and b) when he described the limestones as an " apron reef ", and by Ford (1952) and Wolfenden (1958) when they described the relationships between the " fore-reef" and the limestones of the massif. Parkinson in various papers (1943Parkinson in various papers ( , 1947Parkinson in various papers ( , 1953Parkinson in various papers ( , 1957 assumed that the dip of the " fore-reef " limestone was partly depositional, partly tectonic.…”

supporting

confidence: 52%

Sedimentary Infillings of Fossils and Cavities in Limestone at Treak Cliff, Derbyshire

Broadhurst

Simpson

1967

Geol. Mag.

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Observations of partial and complete sedimentary infillings of fossils and rock cavities at two localities on Treak Cliff, Castleton, Derbyshire, lead to the conclusion that at these localities the present dip of the limestones is largely or entirely depositional in origin. This conclusion agrees, more or less, with claims made in previous publications but, so far as the authors are aware, this is the first time that direct evidence of high initial dips at Treak Cliff has been recorded. PARTIAL and complete sedimentary infillings of fossils and rock cavities are common in the limestones at Treak Cliff (National Grid Reference SK 135832), 1-5 km west of Castleton, Derbyshire. Such infillings have been described and figured by Shrock (1948) and the partial sedimentary infillings have been described as " geopetal" (earthseeking) by Sander (1936). In many cases at Treak Cliff sedimentary infillings occur in isolation and conclusions concerning them are difficult to reach, but at two localities associations of several sedimentary infillings occur and these occurrences will be described in detail.At the cliff exposure approximately 290 metres N, 37 degrees W of the entrance to Treak Cliff Cavern (SK 13408337), well bedded limestone dipping at approximately 35 degrees towards the north-east is exposed. This is locality 6 of Parkinson 1953, fig. 2. The stratification of the limestone is conspicuous on account of differences in the limestone lithology (crinoidal, crinoidal and shelly, and shelly limestones) and in this respect this exposure differs from many others on Treak Cliff where the discrimination between bedding and jointing is frequently difficult. Fifteen fossils partially infilled with calcareous sediment (the upper part of the cavities is occupied by sparry calcite) and two cavities in the limestone completely infilled with calcareous sediment are visible. Although the bedding and the top surfaces of the sedimentary infillings must have been horizontal initially most of them are now observed (as apparent dips) to lie at an angle not only to the horizontal but also to the plane of the bedding in the limestone. Text- fig. 1 gives the details in diagrammatic form.Because the bedding of the limestone at this locality is regular and undisturbed it follows that the observed variation in the degree of inclination of the upper surfaces of the infillings in the fossils must result from rotation of the fossils after burial, possibly during

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supporting

confidence: 52%

Sedimentary Infillings of Fossils and Cavities in Limestone at Treak Cliff, Derbyshire

Broadhurst

Simpson

1967

Geol. Mag.

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“…(4) In the Peak Cavern, at Castleton, Ford (1952) noted a green clay low down in the apron-reef underlying the Beach Beds. Ford interpreted the clay as a decomposed tuff and correlated it with the granular tuffaceous limestone in Cave Dale.…”

Section: Volcanic Rocksmentioning

confidence: 99%

Bathymetry on a Carboniferous reef

Broadhurst

Simpson

1973

LET

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Broadhurst, F. M. & Simpson, I. M.: Bathymetry on a Carboniferous reef. In the Lower Carboniferous deposits of Castleton, Derbyshire, well bedded shelf limestones, apparently of shallow water origin, pass northwards into a marginal tract of poorly bedded apron‐reef limestones which dip at about 30° downwards and away from the ‘shelf’. Geopetal infillings of shell cavities in the apron‐reef indicate only minor movement since deposition, and the observed dip must be due to deposition on a sloping sea floor. At certain times this sea floor was colonised by stromatolitic algae and corals such as Lithostrotion at the apron‐reef crest where there was minimum water depth, followed to progressively increasing depths by (1) a fauna dominated by the coral Michelinia, (2) a fauna of small brachiopods, bryozoa, molluscs, trilobites, and other organisms and (3) a fauna dominated by Pseudamussium. At other times crinoidal debris was the dominant component of the apron‐reef, when an alignment of crinoid stems parallel to the dip of the slope occurred at low levels, but a random orientation at the apronreef crest. Other sediments on the apron‐reef are apparently devoid of macrofossils. Volcanic activity occurred during the development of the apron‐reef, and it is suggested that uplift of the shelf area preceded the subaerial flow of a lava tongue which reached and plunged down the apron‐reef slope and into the sea.

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The scale and significance of solutional loss from the limestone tract of the southern Pennines

Pitty

1968

Proceedings of the Geologists' Association

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New Evidence on the Correlation of the Lower Carboniferous Reefs at Castleton, North Derbyshire

Cited by 7 publications

References 4 publications

Sedimentary Infillings of Fossils and Cavities in Limestone at Treak Cliff, Derbyshire

Sedimentary Infillings of Fossils and Cavities in Limestone at Treak Cliff, Derbyshire

Bathymetry on a Carboniferous reef

The scale and significance of solutional loss from the limestone tract of the southern Pennines

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