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Panorama of a quarry for mining. View from above.

Marble quarries in Custonaci Trapany Sicily Italy Aerial view Today, more than 200 quarries, 54 of which in activity, are recorded in a small area 3 km2 between Monte Cofano and Monte Sparagiaio.

Rough mountain surface. Close-up. Empty space. Rough mountain surface with cracks. Basalt. Slate rock

Gastric mucosa intestinal metaplasia under microscopy

$Wet rough asphalt black bitumen road pavement surface abstract grunge texture close-up top view background banner.\nBitumen is a sticky, black, highly viscous liquid or semi-solid form of petroleum. In the U.S., it is commonly referred to as asphalt. It may be found in natural deposits or may be a refined product, and is classed as a pitch. Before the 20th century, the term asphaltum was also used.\nTarmacadam is a road surfacing material made by combining crushed stone, sand, and tar. It is a more durable and dust-free enhancement of simple compacted stone macadam surfaces. The terms \$