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Published online by Cambridge University Press: 01 May 2009
The economic resources of the Trias as a whole are not great, if we exclude the two main industries (bricks and gypsum), but they are of interest from a practical standpoint, so that a short summary will be given here.
1 Locally some thick-bedded skerries have been utilized in some cases.Google Scholar
1 The stone was used for threshing-floors at Orton, Austrey, Copt Oak, Charley, where bricks were also made.Google Scholar
2 Fetching at one time 10s. a ton.Google Scholar
1 The marls are impervious and dry, the sandstones pervious, 60,000 gallons per hour being obtained from waterstones at Ellistown at a depth of 300 feet, and at a depth of 670 feet in another boring pure limpid water rose 40 feet above the borehole.Google Scholar