About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Sedimentary Structures in the Upper Carboniferous of North and Central Derbyshire, England
John Trevor Greensmith
ABSTRACT
Coarse siltstones and sandstones recovered from a series of borehole cores in the Upper Millstone Grit and Lower Coal Measures of Derbyshire exhibit a variety of minor sedimentary structures. The least common show affinities with wash-outs and were probably caused by subsurface water flow. More widespread geographically and stratigraphically are contorted structures in fine-grained sandstones which have originated in some cases by penecontemporaneous flow down shallow submarine slopes and in others by secondary load-casting adjustment or possibly rilling. Associated with the above are two further types of phenomena which consist of infilled, near-vertical tubes. The smaller, with uniform diameters of 1 mm to 4 mm have been ascribed to annelid borings, whereas the origin of the larger, with their irregular morphology are more doubtful although they have been provisionally ascribed to molluscan activities.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
| Watermarked PDF Document: $14 | |
| Open PDF Document: $24 |