By D.B. Smith
This booklet is worried nearly entirely with a various suite of carbonate rocks that have been shaped close to the margins of shallow tropical seas over the last 5-7 million years of the Permian interval (300-251 Ma). those detailed rocks, jointly often called the Magnesian Limestone, were studied for greater than one hundred sixty years and the names of a few of the early employees - Geinitz, Murchison, Phillips, Sedgwick, Sorby - could grace any geological corridor of status. regardless of this bold attack, and the efforts of a number of later staff, the Magnesian Limestone nonetheless keeps a lot of its secrets and techniques. Permian marine rocks crop out on either side of the Pennines, yet these of the Zechstein Sea to the east are via some distance the thicker and extra various, and in those lie all yet one of many websites chosen for detailed safety. designated bills of the rocks in 26 such websites shape approximately 1/2 this e-book and the traditional and specified gains of those websites are in comparison, contrasted and positioned of their mutual context within the rest of the ebook. The websites have been chosen in keeping with a number of standards, together with forte, representativeness, old significance and suitability for educating reasons and examine; such a lot are inland quarries yet a couple of are within the unrivalled coastal cliffs of classical County Durham the place the most hassle lies in figuring out what to not select.
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