TRANSACTIONS OF THE SECTIONS. 
83 
Kt distorted, and exhibits distinct lines of bedding, of a pale blue colour, caused by 
' ; presence of iron; also lines of different mineral matter, the lamina* frequently 
■ ;ncd round nuclei; and dark lines of crystals of calcareous spar produced, perhaps, 
the me la morph ism of bands of fossils. In the upper part of the quarry the lime- 
*°7 becomes foliated witli^mica,—the foliation being at first parallel with the 
Wing, then becomes wavy and contorted, is affected by small faults, and contains 
"'.:i ul cilcareous spar, and at length passes into a mica slate. At Ben Os there is 
hand in the mica slate, which, having the same strike with the C'rian- 
bed*,nay eventually prove a guide in unravelling the structure of the country, 
l ' ti ** ** : nverarnon tliere >a a bod of porphyritic trap in mica slate, and the 
inju on the sides °f the trap is conformable, four miles from Invorarnon, in a 
,• • 0 “"P) which seuds large and small veins into the mica slate, there is evidence 
1, -,-,'T‘ f ". l,at, ® n having taken place, following the sinnl! veins of trap. Near 
in—i;, mica slate is foliated and contorted; uml a bed of c&lcarcou-i grit cuts 
r~..r 0I ^ “wturlnng the relatious of the curves and lamin®. In n slate 
)|r. Sh.in.P ,v' ,v! 6 ^ 0 latl0n accords in the main with the cleavage, as observed by 
UdsjufJ , e corresponding district; hut whilst the foliation curves round the 
> Uij rook.nre i-L VS ^ aljuts a g a ‘ U8t them, foliation bus also been noticed in 
l^Iorbe bahsbur - v Cra g 8 - 
rj, htinct from n f U ^ e ^’ ** tbat foliation was a superinduced structure; 2, that it 
:: a-menou- 4 ♦w'v® 0 ’ **’ that it was not of mechanical origin, but a chemical 
> i a it was, perhaps, induced by more than one agency. 
B'i C'inf < r^ a r ^' rue Cretaceous Formation in the South of Africa. 
!'- C ; p | ' ARDEM un( l W. H. Baily, of the School of Mines. 
' ,lT - Kraus? tb » t llu ‘ 8, ‘Pposcd 
stint,!, LS'y ; but 
cretaceous rocks discovered in South Africa 
y, - ! ‘mum conteiSn^'^i’ D,u t,mt ‘ ,l " 1 111,1 ,uuntl in Natal an 
“ e eii described hv vt, D S tru v cretaceous fossils. The species were new, and 
^ 4 a,S&, & ^ urc< -» •*“. 
exhibited of tmmonites , Jiaculites, 
ft”?™' By G - n ' 0 »w»oooH, F.K.S., F.G.S. 
tii L°J ner ' s t°ne ofmorlntJ 8 ^ e ,P ort b )’ observing, that the study "f organic remains 
],- • karat from |^ C8 „ g c O‘°gy, and that much more of the history of the earth 
« definite suerr * ru,n , tb V n,, ture and properties of inorganic matter, 
r.lorl’ n ' atlon coutaininn i*, 88U ’ n ol ! n ' neral masses can no longer be maintained : 
■ ui Tlioafma i° W , n ^ an ^ Stm l p s, cla .vs and limestones, regularly or irre- 
piKn, nv , e same countw j caa,1 B ea > ts mineral character in different countries, 
v :nitil p ll ' orii c rock I'lJv 80tTK *times “ n tllL ' quarry. By contact with an 
; transformation” *' ck ? U1 often ‘ >c 80 di*gtti*ed «■ to defy 
'T in 'l'licS i'" to •"M’hle sanditt! ‘ US “}° tydian stone, Jurassic limestone into 
sssr 11 is *° 
r 4 ^kblv 10118 0,1 tndin, is r <>ck, which occupies both the northern and 
Iw 1 '^ | e L m ? n y secondary bed/srin^ 1 . U ? y one ’ but ra ‘ 1,cr of nU p P 0,:Ils ! 
■ ° Wa are C H sli»r.n * i w' 81 1,1 tlial country os jet undiscovered. 
' T Crtthe adt nhi: and Ne P"k ,h * coast of Guscrat, and a 
-,,,1 ,Jf ' 7v rfi«i? hlC !,' Vqs Illustrated f,v "T >7 ’ 1 1C ,ol, °" *“3 is n Vur >’ al) *tract 
Uit'jTthey. ^egur 0 r Cottm r ° a ‘?° coloureJ ma P of the whole country :— 
of trap-tuff, resembling Nile 
ft" ? f the | ,ailk « the tftblc ' lan,i of thc ceded districts 
K M W I CCan > but li K r n b,,1, , r dll—covering almost the entire 
a «<l ca^? UCrct ^n a vy obsorve.I i„ tin- Koukan. 1. contains no 
aadtb? ,eH< ' f tb c beds bi nfin”? 08 ?!' 8 lo 1,10 trav<,, dn of Italy, filling 
,aa «-e recent be,U 1,1 Bonts the Mastodon hive been 
^ Cl iunam e ’ ? nd lar gely i n the°nlili n fl ?* ment8 of pottery. It is used as a 
m - a local name for pr ^“ ctlon of lin ' G - 
an argillaceous limestone used for building in 
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