| Computer Code: |
LYGB |
Preferred Map Code: |
LyGB |
| Status Code: |
Full |
| Age range: |
Oxfordian Age (JO)
— Oxfordian Age (JO) |
| Lithological Description: |
Calcareous, commonly oolitic, shelly, ferruginous sandstone or very sandy limestone. |
| Definition of Lower Boundary: |
Upward change from clay or sandy clay to sandstone or limestone. Commonly a spring line at base. |
| Definition of Upper Boundary: |
Change from sandstone or limestone to grey clay. |
| Thickness: |
0 - 2m |
| Geographical Limits: |
In the southwest corner of the Shaftesbury Sheet 313. Possibly a correlative of the Preston Grit of the Dorset coastal succession. |
| Parent Unit: |
Hazelbury Bryan Formation (HYB)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
On either side of Lyon's Gate [ST 660 060]. |
| Reference Section |
Hazelbury Bryan Borehole (ST70NE/3) [ST 7515 0810] (42.02 m - 43.56 m). |
| Reference(s): |
| Freshney, E C. 1992. Geology of the Bishop's Caundle - Glanvilles Wootton district. British Geological Survey Technical Report WA/92/82. |
| Bristow, C R, Barton, C M, Freshney, E C, Wood, C J, Evans, D J, Cox, B M, Ivimey-Cook, H C, and Taylor, R T. 1995. Geology of the country around Shaftesbury. Memoir of the British Geological Survey, Sheet 313 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E313
|
