1836.] Notes on the Geology, ^c. of Maulamyeng. 271 



2. White quartz-rock, alternating with 



3. Argillaceous schist ; blue or yellow, and slightly talcose. 



4. Quartz-rock, white, or pale yellow, and containing a few scales 

 of mica. 



5. Talcose-schist with thin layers of quartz, alternating. 



6. A white granite with mica abundantly disseminated in large 

 yellow scales. 



7. Pink, or red, quartz-rock. 



8. A grey siliceous substance (resembling chert), with veins of 

 quartz, and succeeded by 



9. Gneiss, similar to that of Zingyet, but more decomposed, from 

 the action of the salt water, — this is probably a continuation of the 

 Zingyet gneiss. 



10. Red iron clay ; the same as No. 1*. 



The above constitute the whole of the primitive rocks observed in 

 the neighbourhood of Maulamyeng, and with which I am at present 

 so little familiar : the secondary rocks, or those now about to be 

 noticed, are of a different character, formed under other circum- 

 stances, and at a different epoch. 



The first of these, is the sandstone of Mowtumma and Mau- 

 lamyeng ; with little variation in the line of bearing, the inclina- 

 tion of the sandstone strata is diametrically opposite to that of the 

 gneiss, quartz-rock, and mica-slate, &c. It has been already shewn, 

 that the strata of the last mentioned rocks dip to the westward at a 

 very great angle, whereas the dip of the sandstone strata is generally 

 to the N. E., and the angle of inclination not exceeding 40° or 50°. 

 This sandstone is more frequently white, presenting spotted delinea- 

 tions of a pink or red colour, and is, in some instances, so highly 

 impregnated with silica, that it becomes difficult to distinguish it from 

 quartz-rock. The less compact portion of the rock is generally inter- 

 sected by veins of quartz. In many instances, the base of the sand- 

 stone is an argillaceous cement, impregnated with oxide of iron, which 

 gives a red colour to the rock, and renders it more liable to decompo- 

 sition ; large masses of this substance are found either alternating 

 with, or resting unconformably upon, the rocks of both classes ; in the 

 latter case, transported from its parent rock (the sandstone above 

 noticed), and assuming the appearance of a hard ferruginous brecciaf. 

 The sandstone hills have an undulating appearance, being free 

 from the contortions and asperities peculiar to the limestone rocks in 



* See Dr. Benza's observations on the filon of hsematitic iron in the sienitic 

 granite of the Neilgiris, vol. IV. p. 424. — Ed. 



f This rock is the same as that noticed at Ky6kmi, (No. 1.) 



