M ountains. - Having thus explained at fame .length., the difei£tions- and pofitions
o f 1 mo u n t a i n s , ?bp|;Cufe they cqaftitute- ; the moft remarkable
feature. of th^'criuntry, aqd ÿet have never received duéliiluftf4tk>n
tfeefe eqnftituent parts remain to he briefly. examined V On Centering
the Highlands^ near Durikeld, the Brft ridges: a re‘ all rivialhills :qfKgfea-
yelj containing ppbblfiS'of micaceous fchilhis^ quMtz, arid granité, &Me-
timfes furmounted'' by* flate* and argillaceous fchiftus. ThefsfOriks
immediately Mrthe north of Dunk-eld»' aref compoled bf micaceous
fchiftus, penetrated in every direction by veins ó f quartz. From .the
junâion of the. Tay and, Tumjl, weftward to Loch. Tay, sthe northern
bound îof the vale is of the fatfie fubftances, fometimes interfperfed with
garnets. The whole fqmôakiof .t e higher
rounded maffes, of granite. ; Thqfentherri ibofe^-of Loch Tay, i Cfj.ntift
of micaceous fchiftus, with a few garnets, interrupted aboiut tthe imMdle
with banks off compact bluifh grey l.ima»ftofte., - The northiraufhores
fimilar, but the liche^ftone i&mifiaefiOJiSjlo The mountains iq EJtesiofchy
are mpftly o f micaceous fchiftus, iriteKpéiffed 'wifh garnit>ï! ©leriiLÿén'
prefcnts fmall. veins o f lead. The vale ;of Tutnel,, between qLheh
Tumel and Loch Rannoch, is overfpread with rounded .fragment^ of
granite and micaceous, fchiftus, but contains granitoid,. andt föme granite.
The lower part off Glen Tilt chiefly Exhibits micaceous ïéhàÈtos";
the upper, principally granite and liîïie-ftQnes. hj
Such até the more fouthern parts :of the. Highlands* In the-; weft,
towards Ben Lomond* micaceous fchiftus alio aboundsj ,feh>t that
mountain is chiefly of gneifs, and the like features ape found in the pe-
ninfula of Cantiré. In the north of Argyleihire appeals' the beautiful
red granite, which chiefly conftitutes the: central chain*7 already
indicated ; to the north of which firft appears micaceous ichiftuè, and
afterwards a remarkable courte of pudding-ftane, extending from Loch
Nefs to Oban f . The mountains in the north have been little explored,
lifhut'
” Mr. A ikin’s Not«.
* Cruachan, according to Mr. Jamefon, confilts, at
which is followed by granite to the tóp. Near Strontian « . ' « 3 grsiiîte'çjf&'gôiîü.'] ijlen Co
prefents curious porphyries. ,
. f According to Williams, I I . IJ9. a like range extends through, Perthfliir«, intp Manteith
■ and Dumbartonihirej croffing the Clyde, near Dumbarton, and reaching the weft fide: (ofi Ayr»
s ljure,
huff Mrs Jamefon tells us, that iis chiefly a jçoâtte argiilaceoüï
fencffftanri,. often appearingûn:the form of IflagSf. while in foriae places
are maffes o£,brqceia, being ;|bebbfes^qf/ sed'îigçahite, micaceous fchiftus
bird quart z* inîarehâceou’s hçafesU Mount «Seuraberi qs- a t’pbe^fyattom
fanfeft®ne, and, fand-iftone flhg, then thé. brie épia,J fueeèeded hy a rock of
white ttpiarfià'ffojthe fUmihit, and probably; foriningqfhe^rpot arid centre
ofcthe.whdjel. i.Mqrben,1 an d o th e r 'mountains jn this-diftridh,(from their
whitpetxljouTjtteeiniitoj be of: the fame, compofitioh. About jt^Ç/Glrd o f
pàithhrfs.iappear grapite and ,micacepus.i(jfe|jiftu:s, andrithàt mountain
eo'nlGfts ïôf niingfedriquartz ancliifelfpan'. ..bte^r/d^eirixoch,. thfejrivers foil
pebbles o f and grariité, ievincing' the materials of the
mdu®tains^hut. thebe lower ftrata cqhfifhtbf; arg^aceoukfandUlohe, till
qeapiUbin, ushtrie are <’granite,t.mieaQeo.usqfohiftnas,. and''hornblende.
The: .feod-Æone’aud.breiccia^ reappear a r Cromarty; pnd at Murray Firth,
h’ut at Fqribhyeprge.the primitive! rocks jbégin.l,.About tw o ‘or three
miles S d o f ^.beffdeea, the red-eolduted argillaceous fand-ftone and
breceknagain occur ; <and thé qaftieHof D unotter ftands <on a ro c k ‘of the
lattebduibftahce.
» ;Tbh^hhtral>arid-'weftem parts of Sutherland
beettexjjlo^ed.; but b-vvould feem that the w e fto f Spthedkrid is chiefly
primitive lim^ftone;,‘wMiclqistwellknown to -form atgreàtf part, oflAffyni*
and ; fometàtries igoritairis' maffesiof yfh&efmarble. The mpüntaxns teem
tri be o£.g*arirte^irid micaseovrsitehiflus, but often prelent the?,fingnlar
featur.c/of vaft flutimits-formedi >oi white quartz. ; If According hriff Wife
ham’s,, this qdasrtsHs ftratifiedi, arid! tinged’ with blue, ?oÉçjbfuifh ïgrey^
and hears AO wegetapiony.fe that at a diftaned àtfif^etebté#; fnow: Near
Loch Broom is found that ffdrtt of granite which asbbéft .adapted 'fop
mill-ftones.
I ifli.ri'Ydioie it would appèat, thht th fem h i#S # graiMtift^dMiil of
th e -Î^Qtifh. mountairisV exëerieU*m a S.*W>f-an'd Ns E. diré6l>îô&f'ffk>m
•Ben Nevis to Poftfoÿ.- Itl fridny' parts k T O b ^ e d ^ ^ n o t
uHuflial, but .tlfe'line is mafkéd by the ^riâÜùàl^tratMiitrii6'f^ètoyiïme-
«*fcM£eéüé îi&é th e rié ^ striri^ fetè.
fliire, where it enters the Firth o ï Clyde ; ifflîi&ice'feèms' tofollowi'-ia IKe feme^iiciSlion, the
grand granitic'chain ofiSçoçilbnmoù'ritainsî
b B 2 Ben
M ountains.'