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The soils and rocks, as well as the
topography, are markedly different above and below the escarpment. Thin, fragile,
alkaline soils over exposed limestone rock characterize the rugged land to the west,
while deep, fertile, clay soils cover the gently undulating land to the
east.
Drainages cutting across the two zones from west to east have deposited
rich, alluvial, silty soils along their floodplains,
and low ridges of old sand dunes with their dry, acid, sandy
soils extend into clay soils to the south.
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