The BGS Lexicon of Named Rock Units — Result Details
Starston Till Member
| Computer Code: | STIL | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Pleistocene Epoch (QP) — Pleistocene Epoch (QP) | ||
| Lithological Description: | Brown clayey-sand matrix-supported diamicton with flint and sporadic chalk pebbles. Laminations are common. | ||
| Definition of Lower Boundary: | The basal boundary of the Starston Till Member is abrupt and commonly erosional. The Member overlyies Bytham River (Bytham Catchment Subgroup) deposits at the stratotype locality, where a lithological change from sand and gravel to till can be observed. | ||
| Definition of Upper Boundary: | The upper boundary of the Starston Till Member with overlying glaciofluvial outwash (un-named) is erosional. Hollows on the upper surface of the till are commonly infilled by a coarse gravel lag. | ||
| Thickness: | To 7m | ||
| Geographical Limits: | Buried beneath Lowestoft Formation till at depth within the Diss and Harleston districts, southern Norfolk. | ||
| Parent Unit: | Happisburgh Glacigenic Formation (HPGL) | ||
| Previous Name(s): | Starston Till [Obsolete Name and Code: Use STIL]
(-1846)
Lower Boulder Clay [Obsolete Name and Code: Use CHAK, STIL, SEAG, RVTI, LWTI, STPTG] (-2079) Lower glacial [Obsolete Name and Code: Use STIL] (-3697) Starston Member [Obsolete Name and Code: Use STIL] (-1205) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Around Starston in the Waveney Valley. See the Diss Memoir. | ||
| Type Section | Section in a quarry to the north of Harleston, southern Norfolk. Lawson, 1982. | ||
| Reference(s): | |||
| Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. | |||
| Mathers, S J, Horton, A and Bristow, C R. 1993. Geology of the country around Diss, Memoir of the British Geological Survey, l Sheet 175 (England & Wales). | |||
| Auton, C A, Morigi, A M, and Price, D. 1985. The sand and gravel resources of the country around Harleston and Bungay, Norfolk and Suffolk. Description of 1:25000 resource sheets comprising parts of TM 27, 28, 38 and 39. Mineral Assessment Report, British Geological Survey, 145. | |||
| Lawson, T E. 1982. Geological notes and local details for 1:10 000 sheets TM 28 NW, NE, SW and SE (Harleston, Norfolk). Institute of Geological Sciences. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E175 | |||