1S14 1 OulUnes of the Mineralogy of the Ochil Hills. 1 IS 



north-east to south-west, correspondu.g with the dh'eetion of the 



? <.?rn,m which runs about half of its course trom east to west, 



':!:^^Z^^^^^- direction, runs fto>n north-east to south- 



""'trinos are very numerous throughout the whole of the Ochil 

 Hin . in some instances they form pools, m others bogs, and m 

 tWnniteand dve rise to several beautdul small streams, 

 Ta^m Se" t ro g^^^^^ The Devon the 



Auln and the May, are the most remarkable ot these streamlets ; 

 ^nd they pour^ into the Forth, the Tay, and the Lrne 



The LL/.>- are also numerous, separating the several chams and 

 the indSual heights from each other. In general they are nanow 

 not exceeding 30 or 40 yards in width; their length depend o 

 thattt the chain or mountain which they bound. These va leys 

 are mis tnun e,,,3 at the western extremity «. ,t»^«, Oel\''^. -he e 

 thev are Z most extensive. They imperceptibly dunmish both nr 

 izJand iu ponance to the eastward. It js, however, n. the latter 

 portfon tha! the romantic valley occurs, in wbch ^^'e U^- «f I;^; " 

 Sores is contained. In this small spot nature has crowded together 

 all that can delif^ht the eye and elevate the imagmation. 



The Ochil Hf Is are bounded to the north and north-west by the 

 Frith of Tav, Strath-Erne, and Strath-Allan; to tl>e south- we t 

 bv he vale of Forth ; to the south by the vales of Devon ot Km- 

 rU and olEden ; and to the east by the left bank ot the Eden, 

 vL-hpi-p it is lost in the right bank of the lay. 



Tlfe prevail ing rock' throughout the whole of the northeru 



boundar£ is a dark brick-red 'sandstone, ^vhich extends as ar as 



Slender to the west, and to Stonehaven * to tlie cast, and is in 



an X^ilhy the old red sandstone. The if 1-f 1^ coaUc^ma^ 



tion according to Mr. Bald,t forms the coal-field ut Clacknianan- 



hi?e and Stirlingshire; and the red sandstone, occasionally assui- 



n" the characters of conglomerate,! again occupies nearly the 



"hole of the valleys of Kinross and Eden ; while grey sandstone, 



a^ clay, bitumin'ous shale, pitch-coal -fj^^l^^'^^ 



the right bank of the Eden, to the south ol St. And ew On le 



left bank, which is more immediately contiguous to the Ochils, 



beds of sand, clay, and marl, have been observed. 



The rocrs'compusing the Ochil Hills occur m nearly the follow- 



ing order : — 



1. Red sandstone. 7- Tuf^- . 



12. Amygdaloid. «• Basaltic clinkstone. 



[\. Grey sandstone. 9. Greenstone. 



4. Limestone. 10. Claystone porphyry. 



5. Slate-clay. 11. 1-elspar porphyry. 

 G. Claystone. 12. Compact lelspar. 



* See ColonM Tmric on ll.c ConKlomerale &c. vol. '• J;'-"";''"i^'~'rian 

 + S..e Mr. baia on the coal-licM of Clackinananshiie, vol. i. VVcrncriaD 



^Trl'i: u aininc.lv tl..- CISC imm.-.lia.cly to Iho no.ll. of r..,.ar in a small 



