It has limestone, slate, iron ore, bituminous coal and other deposits.
"Lippincott's Magazine of Popular Literature and Science" by Various
There is an extensive bituminous limestone formation in Persia, containing 20 per cent.
"Scientific American Supplement, No. 829, November 21, 1891" by Various
It is probable that a magnesian limestone underlies this formation of bituminous shale.
"Narrative of a Second Expedition to the Shores of the Polar Sea" by John Franklin
The Jurassic limestones and marls contain asphalte and bituminous slate.
"Spain" by Wentworth Webster
These limestone cliffs exude much bitumen, and there is a so-called bituminous spring.
"Journeys in Persia and Kurdistan, Volume II (of 2)" by Isabella L. Bird