GEOLOGT. II 



This is the locality from which Captain Tremenheere obtained 

 specimens containing casts of a species of terebratula, which 

 identifies it with the English mountain limestone. 



In a small brook descending from a hill east of the limestone, 

 are seen numerous beds of breccia, containing angular pieces 

 of sandstone and quartz pebbles. They make an angle of 30° 

 or 40° with the horizon dipping to the east, and leaning to- 

 wards the granite west of Tavoy river as an anticlinal axis; as 

 do all the other stratified rock that have been passed over, but 

 th»s is the uppermost in the series ; for the next that are reach- 

 ed a mile farther east are found dipping to the west, and lean- 

 ing to the eastern belt of granite. The strike of the strata in 

 all these rocks where observed, was from two to three points 

 west of north and east of south. 



The highest beds in the next series of rocks, appear in a 

 range of hills back of the Karen village of Thaluor Lung-lung.* 

 They consist of clay slate with sandstone alternating, some of 

 them might be denominated colored shales. The strata are 

 much contorted, and though in some places they make a small 

 angle with the horizon, in others they appear to be. nearly 

 standing on their edges. Old red sandstone much indurated 

 next appears, and beyond this in Khat brookt what Dr. M'Clel- 

 land called, " a finely laminated mica slate'coarsely'laminated 

 with layers of clayslate." The strata are nearly perpendicular. 



This is succeeded by M'Clelland's grey quartz rock, the 

 greenstone slate of others ; and hard clayslate with imperfect 

 crystals of andalusite made or chiastolite follows. Where the 

 clayslate shows itself five miles north of this locality, it is filled 

 with crystals of made that are perfect. The next beds ap- 

 pear like graphic slate. — " Dark blue, uniformly mottled on 

 the cleavage with dull specks of mica — soil and write ; " says 

 a correspondent. The " dull specks of mica, " it is believed, 

 are disintegrated, or imperfectly formed crystals of mackle. It 

 is certain that perfect crystals of this mineral are found among 

 them. Clay slate with layers of mica slate follow, arid in leav- 

 ing this rock near the mouth of Nyoungf lu^ck : and ascending 



*oqo5'i f3c/5G-sp£o 



