| Date Note | Date of base map, used for GBG map? |
| Description | Manuscript geological colouring with detailed key and notes by George Bellas Greenough, [c.1837-1840] on an uncoloured base map 'A Mineralogical and Geological Map of the Coalfields of Lancashire with parts of Yorkshire', by Elias Hall, [1834]. Scale-1:63,660, 100cm x 128cm. Dissected on cloth.
Appears to be a rough draft of LDGSL/947/6/D/4/5. |
| Administrative History | One of the annotations cites the work of James Heywood, 1837. Probably used as part of the research for the second edition of Greenough's Geological Map of England & Wales' (1840).
Note: the base map of this draft is from the first edition, as it mistakenly shows Silurian trilobites under 'Kimmeridge Clay' in the stratigraphical column. Unlike Elias Hall's coloured version, Greenough has marked the location of faults. |
| Publication Note | Information on the three imprints of the base map in Torrens, H & T Ford, "Elias Hall, pioneer mineral surveyor and geologist in the Midlands and Lancashire", 'Mercian Geologist', vol 17 (2011), pp249-261. |