"There is no section of our country that may not reward a diligent search for precious or useful s. The rocks, however, between the Alleghanies and the Atlantic and between the and the Pacific furnish the greater variety and abundance. Here are found the best ores. Gold and silver seem to abound more on the western than eastern sides of both mountain-chains. A trap-region, like the shore of and the , is likely to be a good locality for copper and iron. The , or the region of , furnishes chiefly iron and lead; gold, silver and copper are seldom found. In general, where the layers of rock lie level and contain fossil shells, it is a locality good only for , ( excepted), , and salt. The regions of , , , , etc., offer the greatest inducement to search for useful minerals."