Sentence examples for strata of limestone from inspiring English sources

The Paleozoic sediments are composed mostly of beds of shales (laminated sediments consisting mostly of particles of clay) and sandstones in which strata of limestone occur in places.

The road runs for about five miles alongside the spectacularly serrated Ceide Cliffs, with their countless horizontal strata of limestone and shale rising some 370 feet -- all in all resembling a huge layer cake cut in jagged slices.

So, here goes: start with a layer of large stones, two feet thick, topped by an inch of gravel, five more of clinker — residue from volcanic rock that can absorb and retain water — and a top strata of limestone.

The cover of sedimentary rocks, which have been little changed since they were deposited, contains numerous strata of limestone, and within the limestones near the bottom of the pile is found a distinctive class of mineral deposit.

No direct relationship exists between the thickness and extent of strata and the rate of deposition or the time represented; for example, a stratum of limestone 2.5 cm (1 inch) thick may take longer to form than a stratum of sandstone 3 m (10 feet) in thickness.

In the transition zone of the alternating strata of dolomite and limestone to a compact limestone in the mass facies (4,350 m MD), the fracture density increases and cross-fracturing disappears.

Plateaus of limestone, gritstone, and carboniferous strata are associated with major coalfields, some existing as outcrops on the surface.

The coal-bearing stratum is the late Permian Longtan Formation, composed of limestone, siliceous limestone, sandstone, mudstone and coal, which is enriched in brachiopods, bivalves, dragonfly branch, cephalopods and other fossils.

Van Ess added that the blocks were probably cut in much the same way as the masonry used in the Pont du Gard, a Roman aqueduct in southern France, with each piece split from a larger expanse of limestone along natural fissures between the rock strata.

The North Oxfordshire Heights, rising to 700 feet (210 metres) at Edgehill in the northwest of the county, are developed on oolitic limestone and related strata of the Jurassic Period.

Considerable amounts of groundwater are found within permeable rock strata, and bodies of water are found within caves and other subterranean rock formations, generally of limestone.