. The Quarterly journal of the Geological Society of London. U3J. wm 1851.] SEDGWICK SLATE ROCKS OF DEVON AND CORNWALL. 13 tions of these rocks. The quartzite of the Cam retains its usual struc-ture, and contains fossils. Farther north, from under the rocks of theCam, rises a series of brownish ferruginous grits and coarse slates,like those under the quartzite of Gerrans Bay; and these grits atGreat Peraver also contain many fossils. A single days excursion round the headlands above-noticed, com-mencing at Truro and ending at St. Austell, and made during veryunpropitious weather, could not lea
. The Quarterly journal of the Geological Society of London. U3J. wm 1851.] SEDGWICK SLATE ROCKS OF DEVON AND CORNWALL. 13 tions of these rocks. The quartzite of the Cam retains its usual struc-ture, and contains fossils. Farther north, from under the rocks of theCam, rises a series of brownish ferruginous grits and coarse slates,like those under the quartzite of Gerrans Bay; and these grits atGreat Peraver also contain many fossils. A single days excursion round the headlands above-noticed, com-mencing at Truro and ending at St. Austell, and made during veryunpropitious weather, could not lead to the discovery of many in the Museums of Penzance and Truro we had seen a goodcollection, made with great labour, chiefly by Mr. Peach, from therocks I have just noticed; and I subjoin the following list, fromthe species now deposited in those museums, with a reference tothe places where the several species were Great Peraver north of Gorran Haven:— Orthis elegantula, Balm.; rare. parva, Pander ; very abundant. calligramma ? Dalm. t
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845
