358 G. W. Colenutt—On the Osborne Beds. 
trate them, and it will be observed that in both cases the hade of 
the fault is in the same direction as the dip, but at a greater angle 
than it. To contrast with these figures I have chosen two other 
faults for Figs. 5 and 6, each belonging to one of the other two types. 
Fia. 3. Fia. 4. 
Fie. 3.—Normal fault, concealing bed 5. 
Fic. 4.—Reversed fault repeating beds 3—4. 
Fic. 5.—Normal fault repeating beds 0—1. 
Fic. 6.—Reversed fault, concealing bed 4. 
Additional complexities will of course be introduced if faults have 
a hade lower than the angle of ground slope; but I prefer to leave 
each such case to be dealt with on its own merits. 
Dip-faults—The result of a number of drawings of faults 
shows that the following law exists. The outcrop on the upthrow 
side is pushed forward in the direction of dip, unless the angle of the 
latter is less than that of the ground slope, when the reverse occurs. 
Good figures will be found in the manuals by Professors Green and 
J. Geikie. 
Connecting together the exceptions in all these cases, we find they 
occur—when the strata dip at (1) a less angle than (a) the ground in 
a dip fault, (b) the hade in a strike fault, and (2) at a greater ASIC 
than the ground in the valley outcrop. 
VI.—On a Portion oF THE OsBoRNE BEDS OF THE IsLE OF WIGHT, 
AND ON SOME REMARKABLE ORGANIC REMAINS RECENTLY DIS- 
COVERED THEREIN. 
By G. W. Cotenvurt, Esa. 
T several places along the north-eastern coast of the Isle of 
Wight the Osborne Beds crop out on the shore to some extent 
and admit of examination. From the great difficulty which is 
usually experienced by geologists in getting at any workable section 
or outcrop of these beds but little, one might say almost nothing, is 
known about them. ‘There are few divisions of the Tertiary strata 
of the Island which present so many variations both of composition 
