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| *****SWAAG_ID***** | 993 |
| Date Entered | 07/05/2017 |
| Updated on | 08/05/2017 |
| Recorded by | Tim Laurie |
| Category | Geological Record |
| Record Type | Geological HER |
| Site Access | Public Access Land |
| Record Date | 06/05/2017 |
| Location | Sleightholme Beck |
| Civil Parish | Bowes |
| Brit. National Grid | Hidden |
| Geology | Black shales over The Great Limestone. |
| Record Name | Lingula, the earliest recorded brachiopod in the Geological Record which survives today unchanged. |
| Record Description | Lingula squamaformis, a distinctive flat, ovoid slipper shaped fossil brachiopod. Found in black shales overlying the Great Limestone in the base of a low cliff on the south bank of Sleightholme Beck, see Reference 1.
When first recognised, these fossils were abundant and easily found. In the meantime however low water levels in the stream have allowed the growth of moss and algae over this exposure which is at stream level and these fossils are now very difficult to find. |
| Dimensions | See photos |
| Additional Notes | The time range of this Genus extends from the Ordovician to Recent, Reference 2.
References:
1.D.A.C. Mills and Hull J.H.,1976. 'Geology of the Country around Barnard Castle.' Memoirs of the Geological Survey of Great Britain. NERC. pp45,46.
2.British Palaeozoic Fossils. 1966. British Museum (Natural History). Plate 46.
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| Image 1 ID | 7319 Click image to enlarge |
| Image 1 Description | Lingula squamiformis on slab in Sleightholme Beck |  |
| Image 2 ID | 7320 Click image to enlarge |
| Image 2 Description | Lingula squamiformis on slab in Sleightholme Beck |  |
| Image 3 ID | 7321 Click image to enlarge |
| Image 3 Description | Lingula squamiformis on slab in Sleightholme Beck |  |
| Image 4 ID | 7322 Click image to enlarge |
| Image 4 Description | Lingula squamiformis on slab in Sleightholme Beck |  |
