VII. On the Fresh-water Formations in the Isle of Wight, with some Observations on the Strata over the Chalk in the South-east part of England.

摘要: INTRODUCTION Among the geological researches which have lately been made in various parts of globe, none more interesting than those M. Cuvier and Brongniart environs Paris. These naturalists described a series mineral strata differing many respects from all that were formerly known, particularly distinguished by their numerous singular organic remains. The animals whose exuviae had hitherto commonly noticed regularly stratified rocks inhabitants an ocean: but Parisian fossils belonged to freshwater lakes marshes, thus developing new unsuspected agents forming beds. The French are deposited cavity chalk stratum extends through considerable part north France. bottom this hollow is extremely irregular; before it was covered materials now found it, must presented partial cavities projections, latter appearing as so islands piercing other strata; important observation there no correspondence between irregular form present surface country. Although number distinct beds or layers basin very considerable, yet authors memoir reduced them eleven principal classes. 1. Chalk. 2. Plastic clay. 3. Coarse limestone sandstone. 4. Siliceous limestone. 5. Gypsum marl, containing bones animals,