. A geological reconnaissance of the Dominican republic . on index map, PI. XXI.] No. and name ofconcession. Concessionaire. Approximate area in square kilometers. Minerals designated. 2099938138885459523 Gold, silver, , silver, , , nickel, 2. Boya do Do. 8. Bulla M. H. Telleria Copper and gold. 9. Zarzuela Gold, nickel, 11. Yaque del Sur do 12. Guanarate 508346900615647 do Copper, iron. S. D. Inv. & Dev. Copper, silver, , iron, , placer gold. 17. Perseverancia Dr. Diaz Pardo 18. El Cobre Del Mo
. A geological reconnaissance of the Dominican republic . on index map, PI. XXI.] No. and name ofconcession. Concessionaire. Approximate area in square kilometers. Minerals designated. 2099938138885459523 Gold, silver, , silver, , , nickel, 2. Boya do Do. 8. Bulla M. H. Telleria Copper and gold. 9. Zarzuela Gold, nickel, 11. Yaque del Sur do 12. Guanarate 508346900615647 do Copper, iron. S. D. Inv. & Dev. Copper, silver, , iron, , placer gold. 17. Perseverancia Dr. Diaz Pardo 18. El Cobre Del Monte & Sanchez MINERAL DEPOSITS NEAR HATILLO AND MAIMON, PROVINCE OF LA VEGA. By Clyde P. Ross. Deposits of ores of copper and iron south of Cotui, on and near Rio Yuna,have been known for many years. Much prospecting has been carried onintermittently, but the results have been discouraging. The deposits liealong the northern border of the Cordillera Central at some distance from 228 REPUBUCA DOMINICANASERVICIO GEOLOGICO MEMORIAS, TOMO 1, LAM XXI. MAPA DE LA REPUBUCA DOMINICANA QUE INDICA LAS CONCESIONES MINERAS VICENTES,JULIO DE 1919 INDEX MAP OF DOMINICAN REPUBLIC SHOWING MINING CONCESSIONS IN FORCE IN JULY. 1919. ECONOMIC GEOLOGY. 229 the sea and from large towns, so that transportation involves difficultproblems, but good wagon roads or even railroads could easily be con-structed. This report is based on observations made by Wythe Cooke and thewriter in April, 1919, during a rapid reconnaissance of some of the moreaccessible deposits. The limitations of time prohibited a thorough exami-nation or prospecting for other deposits. MAGNETITE DEPOSITS NEAR HATILLO. Prospectors have dug shallow pits in the red clayey soil of the limestonehill a little north of west of Hatillo, at the border of the savanna on whichthe settlement is built. The soil in these pits, most of which are nearthe summit of the hill, contain subangular blocks of massive magnetite,20 to 25 centimeters wide. In
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