Topics containing "shale"
rock, strata, hills, district, sea, quartz, slate, veins, deposits, gravel, vein, thick, shale, extent, structure, drift, dip, glacier, bottom, distance, shaft, sandstone, top, character, shales, origin, miles, Creek, stratum, tunnel, fossil, quarry, formed, marine, locality, formations, fine, sands, gneiss, Survey, glaciers, forming, remains, Cretaceous, deposition, slates, drainage, fragments, extends
miles, coal, area, distance, square, average, worked, contains, north, deposit, latter, distant, upper, Mountains, ocean, commercial, heavy, vicinity, travel, scale, counties, hundred, pits, North, sandstones, ash, lowest, Black, mined, Middle, land, plant, portion, coke, mouth, minerals, regions, sufficient, traffic, reported, track, measures, consist, grate, probable, width, parallel, water, nine
sand, clay, water, feet, bottom, covered, stones, inches, broken, mass, filled, materials, mixed, solid, appearance, diameter, loam, pit, pieces, layers, air, entirely, hot, glass, eight, forming, calcareous, mould, area, abundant, particles, Sand, mound, portions, proportion, burning, sands, rain, cement, observed, elevation, scattered, waste, yellow, clays, drawn, running, fragments, About