Note 63 — Chapter XXIX · ON VITICULTURE IN SPAIN AND PORTUGAL
Reading edition
The following are the constituents of the four different classes of soil of the Jerez vignobles, according to Don Simon de Roxas Clemente:—1st. Albariza, chiefly consists of carbonate of lime, with a small admixture of silex and clay, and occasionally magnesia. 2nd. Barros, composed of quartz or sand, mixed with clay and red or yellow ochre, which forms horizontal bands extending along the coast from the mouth of the Guadalquivir as far as Conil. 3rd. Arenas, or pure quartz ore sand. 4th. Bugeo, which contains argillaceous loam, mixed with carbonate of lime, some quartz ore sand, and a large proportion of vegetable mould.—"History of Modern Wines," by Dr. Alexander Henderson, p. 190.