124 Reeonh of the Geological Survey of India. [vOL. xii. 
the westward, nor has the cretaceous band there observed been found reappearing 
with the same character, if at all elsewbere in this district. 
For fuller detail I refer the reader to the already described Sirban sections 
(Mem. Geol. Surv. Ind., vol. IX, Art 3, p. 331) ; but to convey a general idea 
here, I abstract the table of succession given in that paper at p. 2, viz. — 
6. NtratMULITlC.—Thick lltnestones with some shaies, fossils in places. 
5. CbetaceoTTS. —Thin-heddod limestones without fossils apparently. 
Impure ferruginous sandy limestone, weathering rusty—fossils. 
4. JuBASSiC.—Black Spiti shales. 
Vnconformity. 
3. TkiasSIC. —Thin-bedded limestone and slaty shales, dolomite, limestone; fossiliferous 
(Megalodon and other) beds. 
2. Below the Tbias. —[Infra-Trias] Hajmatite, dolomite, qu.artzite, sandstones and breccia. 
Marked Unconformity. 
1. Paleozoic Attock slate. 
Of these groups the Attock slates, ascertained from larger developments 
to be the same group exposed at Attock, have been already described. 
The infra-Trias, however, requires a few words of description in order to 
enable a comparison to be formed between it and the Tanol group. It seemed 
to show a triple sub-division, the lower one consisting chiefly of red sandstones, 
red shales, and red quartzitic dolomites, underlying another zone of dolomites of 
lighter color often highly silicious and of very considerable thickness. These 
words would apply almost equally to those well marked red and lighter colored 
dolomitic zones of the lower, but not lowest, part of the Tanol group. The 
sections given in the Sirban memoir may be compared with that crossing the 
Tanol group, No. 4, appended to this paper. 
The third sub-division, composed of hsematitic rocks, quartz breccias, sand¬ 
stones and shales, seems less capable of recognition to the north ; but it might be 
there subordinate either from lateral change or blending with the dolomitic zones. 
4. Triassic.—ln this group the further examination of Hazara has revealed 
the existence of a great development of limestones with some shales. Many 
of the former show features characteristic of the Sirban exposure, yet are most 
frequently without the arrangement into more or less defined, though sometimes 
obscurely, fossiliferous zones. Owing to this local character the exact lines of 
the Sirban section have not heen traceable amid the larger and thicker exposiires 
elsewhere. Although the most characteristic feature,—the presence of numbers of 
impacted Dicerocardia, sometimes accompanied by shells of the Megalodon, 
visible in section only,—has been observed in one or two localities; the point of 
itself is insufficient to establish actual identity of these fossiliferous beds, but 
decisive as to the general ago. Outlines of these fossils from the Sirban rocks 
are figured at page 8 (338) of the Sirban paper, 1. c. 
Other fossils among the triassic beds generally are so few, so fragmentary, 
and so rarely met with, that it is often doubtful whether the beds are really 
