A hard, chalky deposit of calcium carbonate that forms in soil, typically in arid climates, creating a cement-like layer in the ground.
From 'calc-' (calcium) + '-rete' (network, from Latin 'retis'). Coined by geologists to describe the porous, network-like calcium deposits found in desert soils.
Calcrete is like nature's concrete—it forms in hot, dry places over thousands of years as water carries calcium through soil and it evaporates, leaving behind a rock-hard layer that ancient peoples actually used as building material!
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