70 
REPORT—1847. 
arising from the conrentional use of red for the old uiistratiiied rocks, p*le red for 
green forchalk, &c. j but it is evident that no two authors are enctlj 
a^ecd as to the use of these particular colours; and with respect to the mioeni#- 
gical anomalies, they are equal in either cas6,—any one stratum in the ffboleaie 
cont^ning in some part or other the colours of any of the others. Co#I,botftt 
a^ident w to position, niiglic still be iudicatud by black, and the surface itcuailS' 
tions by a general brown; tlic repetition of red is an evil; but as tlie only ream fer 
adopti^ tlie standard will be, its general recognition in Nature's only scale. Bir^ 
tra^ iteration srould Iiuivc this proposition in the same calegorj with there it is 
sri«.hcd to supersede; however, the spotted or striped character and isolatedpoBW 
^11 always distiii^iish them, and as trap rocks tnav be of any date, there is no « mI 
Miwnswtency in its approxiiuation to the modern rocks. 
One great advantage of this plan will be, the ready appreciation of unccmfbraq 
y tlic obvious means of a break in the honnony uf tW siiectrom, the ctumdeocK* 
an colours being well-known to be the best contrasu to one another. Tbetob. 
ouence or «>»sonance of the coloured bands, loo, at distant pointsio iheamemi 
r ua-Hin, will be of c.ssential service in computing general or paftlo! eifrstWBflr 
epressions on that area; the eye once accustomed to an order of colotin, willmf 
vtfecvoK as an algebraic formula, or an instniment of discovery; thepofltknjfit' 
«r»i**^* colours in possible or impossible combinntioniiwill either confirm tbcsccorrr 
*cad to the re-examination of iietWy-dcscribed tracts; and Jt^l 
P^cse^t attempt to give geological colours a leading sense and>ldsa 
r I modifications introdneed by men of exncricncf, lad w 
aUv.ncS“^^e oflKenccT ‘“"S 
Om the Geotogical Structure of Barbados, nnd on Ehrenherg’s Polycrstiiife ^ 
b^gT*.PA Bg Sir Robert H. ScBf«- 
uHirbi ■« of Barbados leaves no doubt, even to the casual observer, thM< 
mmt labours of the coral animals. It represents owof 
cc>sivt< “ ‘^“*'** island, which by a gradual elev^on with 
above the ««« hecn raised to a height of nearly tivelve hundred 
breadth ‘sland is about twenty-one miles in length and thiiteea i 
rn™in«® fcaturea, namely,— 
B hmestone, with bed.s of calcareous marls, containing recent sbellt 
calcarftin* *tmdstones, intermixed with ferruginous ni«t® 
minute fminnpn/'^T*’ **‘.^®*'®”* of clay, earthy tnarls, frequently 
feasor ** °f pomice, in a manner "hitherto nowhere else obseived byP™ 
»7rini, ol^ofeC" ’■* 
*• is peculiar to the dUtrictal-' 
The cormltina r.. *“ “‘“■^»dos, the Scotland formation. , 
•nd ‘bulk of the superficial area of Bsrl^ 
imrlior eWeflv characteristic feature 
forms of elevations rising progresureff 
fr^aem,;Tan1 ke tjie c.^tral ridge of the island. These terraefs U prdp“-* 
tr^’crsed^bv dei-Ilfi ** ^stance* nearly two hundred feet high. Tbt^ 
*'idg"rn avir^7Pfr“"^’ radiate from the axis of the 
eastward wh7i^i i“snaer to the west, to the noith and south, but "i* ^ 
tC aJihor L„ 'T' formation abruptly ends. . , 
®f the elevalorr n,,^^ ^cubt that these terraces were formed during l«rio(l?^ 
tcooecs, d. not^ir f*’® denuding power of the sea. He bss 
more recent date^tl. periods. Ciirist Church p-irish, or the Ridge, u “ 
abovo the water i«»wi hills, and appears to have made't* 
.-^P‘>c4. mled - hTv ^ ‘he elcvalory movement. Thc.uccr^i^ 
islands. “Hey, which previously formed a narrow strait betwef^ 
in the commencement, rapid and accompanied by considerablf 
