Greensands sentence example
- The latest Cretaceous is the Ripley formation, which lies west of the northern part of the last-named, and, about Scooba, in a small strip, the most southerly of the Cretaceous - it is composed of coarse sandstones, hard crystalline white limestones, clays, sands, phosphatic greensands, and darkcoloured, micaceous, glauconitic marls; its greatest thickness is about 280 ft.
- Geologically the region is made up of Carboniferous limestones, clay slates and sandstones, containing anthracite and coal; of Cretaceous marls, chalk, sandstone and greensands - chalk cliffs, in fact, accompany the Don for 200 m.; and of Miocene limestones and clays.
- These Cretaceous limestones are interbedded with glauconitic greensands, as at Moeraki Point in eastern Otago.
- The next deposits, as the scarps are approached, are greensands of "Selbornian" age, succeeded by Cenomanian, and locally by Turonian, sands.
- The narrow strip of Greensands appearing from beneath the Chalk escarpment on its northern side is crowded with small towns and villages on account of the plentiful water-supply.Advertisement
- Next in order come the Greensands and Gault, which lie at the base of the Chalk escarpment, between that formation and the Oolites.
- In general, Tertiary basalts rest unconformably and in faulted contact with cretaceous greensands and limestones or dark gray, fossil-bearing Jurassic mudstones.
- At the base, fossiliferous, phosphatic, conglomeratic greensands (0-1m thick) rest unconformably on the strata listed above.
- In general, Cretaceous greensands and limestones or Tertiary basalts rest unconformably on a range of older Mesozoic rock units.