[ 289 ] 



XXV. — Memoir to illustrate a Geological Map of Cutch. 

 By C. W. GRANT, Esq., Capt. Bombay Engineers. 



[Read February 22, 1837,] 



CONTENTS. 



Geographical Position. — Physical Aspect of the Country. 

 Formations : — p. 290. 



1. Syenite and quartz rock, p. 291. 



2. Sandstone and clay, with beds of coal — Iron ore and manufacture of — Coal — Borings 



for coal — Vegetable impressions — Extent of coal field — Alum works near 

 Mhurr, p. 292 — 296. 



3. Red sandstone, p. 296. 



4. Upper secondary formation — Description — Relative position with respect to the 



other strata — Apparent position with respect to the English series — Fossils — 

 General shape of the hills — Manner in which the hills have been formed, 

 p. 296—299. 



5. Nummulitic limestone and marl — Characteristic fossils, p. 300 — 302. 



6. Tertiary strata — Fossils — Extent of the formation, p. 302 — 304. 



7. Alluvial, or recent deposits — Land gaining on the sea — Marine forests — Effects of 



floods, p. 304 — 306. 



8. Volcanic and Trappean rocks — Evidences of disturbing agents — Distinct periods 



of volcanic eruptions — Alternations of basalt with strata of the upper secondary 

 formation — with calcareous grit — with travertin — Dykes of basalt — Extinct 

 volcano — Igneous outbursts, p. 306 — 318. 



The Grand Runn. — Natural walls — Successive depositions of marine and fresh-water strata, 

 p. 318—325. 



Conclusion, p. 325. Appendix, Description of Fossils, p. 326, et seq. 



Geographical Position, and Physical Aspect. 



The province of Cutch, in the East Indies, is situated between the 22° and 

 24° of north latitude, and 68° and 70° of east longitude*. It is bounded to the 

 north by the Grand Runn, beyond which is the Thur or Little Desert; to 

 the S.W, and S. by the Gulf of Cutch and the Indian Ocean ; to the E, and 

 S.E. by the district of Guzerat; and to the N.W. by the eastern branch of 



* See Map, Plate XX. 



