Chap. XXXT.] 
DIIAR FOREST. 
673 
ably post-ViiuUiyan. They arc usually very siliceous and have been re- 
ferred to by Bhinford' as ' honistone-broccias.' The Bijawar rocks 
steemed to have been lateritiz^^d at the surface in pre-Lanieta times by a 
process analogous to that by which the post-trappean laterites have 
been formed. This pseudo-lateritc has been designated 'porous breccia' 
bv Mr. Vredenburg, and is composed of angular fragments of quartz, 
hornstone, quartzite, etc., set in a soft porous, loamy, matrix. Tn 
many cases this porous breccia has probably been formed directly from 
the hornstone or chert-breccias ; but it is not certain that this is always 
the case, and that other rocks, such as siliceous limestones, may not have 
given rise to some of the porous breccias. The lowest I^ameta beds 
probably consist sometimes of this porous breccia rearranged by water, 
so that it is often impossible to decide where the latter ends and 
the Lametas begin. The ^irgillaceous-sandy matrix of this breccia is 
often found replaced by manganese oxides (pyrolusite, wad, or psilome- 
lane), so as to yield a breccia of angular fragments of white quartz, 
etc., set in a black matrix of manganese oxide. 
The Lameta sandstones and conglomerates, where porous, have also 
often been impregnated by oxides of manganese, and where the sand 
grains and pebbles were originally set in an argillaceous matrix, the latter 
has often been replaced by psilomelane. No cases have yet been 
fomid of undoubted original manganese oxide in the Lameta rocks. 
The following is a list of the occurrences of manganese in this 
State : — 
1. Hill 925 feet, Kanar. 
2. Ratagarh. 
3. Hill 888 feet (S.-W. of)'. 
4. Katotia. 
5. Pola Khal. 
6. Kheria Kund. 
7. Pan Kuar. 
Of these Nos. 1 and 7 were foimd by myself, and the remainder by Mr. 
Vredenburg. None of them are of any economic value, 
1. Hill 925 ft., Kanar 
In a small stream.-bed draining down to the east, from hill A 925, 
which lies about 1 mile east of Kanar on the Kanar River, is a small 
1 Mem. G. S. I., VI, p. 198, (1869). 
