.AlAliVl.AXD GEOLOGICAL SLUVKY 13 



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The Natural Deposits 123 



The Clays 123 



Tertiary Clays 124 



Quaternary Clays 125 



The Sands 127 



The Gravels 12H 



The Building Stone 128 



The Marls 128 



The Diatomaceous Earth 130 



The Wateh Resources 131 



Springs 132 



Dug Wells 132 



Artesian Wells 133 



The Magothy ( ?) Horizon 133 



The Calvert Horizon 134 



THE SOILS OF CALVERT COUNTY. By Jay A. Bonsteel and R. T. 



Avon Burke 133 



Introductory 135 



Physical Geography 135 



Geology 137 



Soil Types 141 



The Norfolk Loam 141 



The Leonardtown Loam 143 



The Susquehanna Gravel 147 



The Windsor Sand 148 



The Norfolk Sand 151 



The Sassafras Loam 154 



The Sassafras Sandy Loam 157 



The Meadow Land 158 



The Swamp Land 160 



The Agricultural Conditions 161 



THE CLIMATE OF CALVERT COUNTY. By C. F.. von Herrmann 169 



Introductory' 165) 



The Factors Controlling Climate 169 



The Physiographic Features of Calvert County 171 



The Influence of Water on the Distribution of Temperature 173 



Meteorological Data Available for Calvert County 177 



Temperature Conditions 178 



Precipitation 181 



