21. The soils are underlain by hard calcium carbonate caliche layer several inches thick. 22. The Erfurt Formation is underlain by the Upper Muschelkalk. 23. The watershed is underlain by Pottsville and Allegheny Formations. 24. In the streams lower reaches, this is underlain by glacial lake clays. 25. The Trawden Limestone Group is preceded ( underlain ) by the Roddlesworth Formation. 26. An area of of the county is known to be underlain with natural asbestos. 27. The upland area is underlain by Nature Conservation Review and Geological Conservation Review sites. 28. The western part comprises Torridonian sandstone underlain by Arkle, C�l M�r and Suilven. 29. The Shasta Valley is dominated by nearby Mount Shasta and underlain with geologic time. 30. Quezon s underlain with sedimentary rock formations the dominant being recent depositions of alluvium.
