The Wiltshire archaeological and natural history magazine . while the large object above this is a Foraminifer (Verneuittina). 328 The Geology of X60 Fig. 7.—Structure of Chalk Rock (magnified sixty times). The Chalk Rock is found near the top of Morgans Hill andOldbury Hill, and has been dug from shallow pits in many placesall round the borders of Salisbury Plain. 7. Upper Chalk. Above the Chalk Rock comes the Upper Chalk,a pure soft white Chalk with numerous layers of flint nodules. ThisUpper Chalk is not well exposed anywhere near Devizes, so I do notpropose to describe it in deta
The Wiltshire archaeological and natural history magazine . while the large object above this is a Foraminifer (Verneuittina). 328 The Geology of X60 Fig. 7.—Structure of Chalk Rock (magnified sixty times). The Chalk Rock is found near the top of Morgans Hill andOldbury Hill, and has been dug from shallow pits in many placesall round the borders of Salisbury Plain. 7. Upper Chalk. Above the Chalk Rock comes the Upper Chalk,a pure soft white Chalk with numerous layers of flint nodules. ThisUpper Chalk is not well exposed anywhere near Devizes, so I do notpropose to describe it in detail, though near Salisbury it is some600ft. thick, and in the Isle of Wight more than 1000ft. There isno doubt that it originally spread across the whole Vale of Pewsey,and, together with the underlying Chalks and Greensands, spreadwestward across Somerset and Gloucester to the mountains of Wales. The whole of England was submerged beneath the ocean in whichthe Upper Chalk was deposited, and it is not even certain whetherthe summits of the highest mountains in Wales remained above thesurface of the water. Some of my readers may ask, Where hasall th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
