Subject ASC00009s6
Recreative Science.
1, Page 235 (1860)
Natural History Museum Library, London
BHL Page 2539504
Keywords
coal strata Intermediate strata coal measures intermediate strata geology soil Coal measures Intermediate Strata clay Whinstone core sampling geological strata depth bore borehole dig sample Coal measures sand example of coal measures and intermediate strata snad rock shale stone whinstone indurate Coal Measures Intermediate Strata Strata sand-rock sandstone