A soil of an order comprising temperate grassland soils with a dark, humus-rich surface layer containing high concentrations of calcium and magnesium.‘These include sand and gravel deposits which are poorly vegetated, sandy entisols which support marshes and bottomland hardwood forests, and mollisols with scattered Bur oaks with prairie grasses and forbs.’
- ‘Soils of this habitat appear to be true mollisols with pH range of 5.7 to 6.7 and very high calcium content.’
1940s from Latin mollis ‘soft’ + solum ‘ground, soil’.
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