382 
DAKYNS : FLOTS. 
the term E. and W. with some latitude, as is usual in such sub- 
jects, these E. and W. lead veins are crossed by others of a N. 
and S. trend, which are on this account called " cross veins." 
These cross veins do not as a rule yield ore, they are mostly 
mere spar veins, and when they do yield ore, it is at the inter- 
section of an E. and W. vein for the most part. On the other 
hand, the E. and W. veins sometimes stop off against a cross vein. 
They are also sometimes, perhaps generally, shifted, " or thrown ' 
as the term is, by the cross veins, i.e., if you follow an E. and W. 
vein having a certain general direction or "random "till you come 
to a cross vein, a corresponding vein of the same general random 
will be found to start some distance to the north or south on the 
other side of the cross vein. 
Now at Grimwith Moor, adjoining the ore. wherein the kind 
of veins described above occur, but composed of the same rocks, 
viz., Carboniferous Limestone, lead ore is found not in veins but 
in Sots. I have already said that this term indicates ore lying 
between the beds ; but it must not be supposed that such ore runs 
to any great distance along a bedding plane as a coal-seam does. 
The mode of occurrence is this : — The flot planes only bear lead, 
where a spar vein, one of the cross veins mentioned above, inter- 
sects it. So much for the first kind of flot. 
2nd. Flots in connection with courses of Dun Limestone. — 
In the Buckden, Gavle, and Bishopdale district, the mode of 
occurrence of this kind of flot is rather different from that describ- 
ed above. The ore has been hereto developed in certain definite 
planes or at certain definite horizons only, and not everywhere 
along this horizon, but only at the intersection of other and cross 
courses ; but in these cases it is not so much, at the crossing of a 
spar vein, as at that of a course of Dun Limestone. Dun Limestone 
is a dolomitized limestone, and is called Dun from its brown 
colour. In this country the ordinary limestone, Yoredale or Car- 
boniferous, appears to have been dolomitized sometimes in beds, 
sometimes in great irregular masses ; but more generally in ver- 
