132 CRETACEOUS ROCKS OF S. INDIA. [PaRT II. § 1, 



It is noticeable tliat a line drawn fi-om the point where the boundaiy of the Arrialoor beds 

 Area of irregular bed- turns to the Soutli-wcst near Shillagoody station, across to 

 ^"'^' Koloture, where the group rests on Trichinopoly beds, marks off 



an area, (to the South) within which the strike of the bedding by no means conforms to that of 

 the boundary of the group. As for South as Shutambaudy and Kannanore, ther ocks have 

 indeed a tolerably regular bedded structure, the dip of which, (except where close to the boun- 

 ^^ly?) is at a low angle to the North-east, but beyond this all becomes confusion, and 

 so far as can be ascertained, there is no definite line of demarcation between the beds of the 

 Arrialoor group and those of the Trichinopoly group described at page 115. To the North-west 

 and South of Moulvoy a Perfect chaos of irregular bedding, as inextricable as that which charac- 

 terizes the Southernmost deposits of the Trichinopoly group, is 

 App.ircnt passage. , j- 



exhibited in the steep banks of the nullahs, and although a few 



fossils are met with in the irregular calcareous bands here and there intercalated in the sands, 

 which constitute the main portion of these deposits, they are, so far as I have been able to 

 identify them, of such species C Ai'ca Trichinopolitensis, e. g.) as are common to the two groups. 

 To the East of Moulvoy some greenish sands are exposed in one or two wells, which, to judge 

 from their mineral character, are probably of Arrialoor age, and in a calcareous band, a short 

 distance to the East of Shutambaudy, I found a specimen of N. formosus, n. s., one of the 

 characteristic Nautili of tlic Arrialoor group. 



From Shillagoody station to Shutiimbaudy, the lower beds of the group are marked by a 



series of parallel bands of calcareous grit, intercalated in sandy 



ghale, some of these bands are full of fragments of Lioceramas, a 



pecullarit}^ which is very characteristic of the Arrialoor beds ; and where other indications are 



wanting will frequently serve to distinguish them from similar grits in the Trichinopoly group. 



These beds are quarried to some extent for building purposes by the natives. 



On the slope of the high ground to the North of Shutambaudy, the beds are well exposed 



in some deep nullahs. They consist of soft shales with calcareous 



Beds North of Sliutumbaudy. , , , . j- _<• -i r a ■ i mi. j- j. 



bands, and contam a few fossils of Arrialoor age. They dip at 



a low angle to the N. N. E or N. by E. 



Crossing to the western boundary of the group, we meet with a bed containing characteristic 

 Fossiiiferous conglomerate. Arrialoor fossils in the village of Kannanore, near the tank bund, 



Kaimanore. ° ^^^^t^ ^-^^^ j^ ^ jjj^l,, j^^^H^j^ ^^ tj^g Soutli-east of the Adllage. In 



sonic places this bed is conglomeratic, crowded with large pebbles of yellow quartz 

 evidently derived from the granite to the South. The fossils are chiefly of species 

 common to the Trichinopoly and Arrialoor groups, Trigonia, Venus, Pecten 5-costatus, 

 Cardium Hillanum, &c., but an Ammonite, (undescribed, sp.) a Natica, a Perna, and a 

 few other fossils, are of species found only in Arrialoor beds. This conglomerate bed 

 rests on some white false-bedded sands, (exposed in some small nullahs to the West of the 

 tank), which extend for some distance to the South of the village, and are identical in cha- 

 racter with those which, near Moulvoy, contain- fossilized tree trunlis (page 118), and 

 those which, with granitic gravels and other irregular deposits, to North of Serdamungalum 

 underlie the fossiiiferous beds described at page 117. Moreover on following the shallow 

 sections of these sands, exposed in small nullahs to the South of Kannanore, they seemed to 

 pass gradually into shales with intercalated bands of calcareous grit, containing a few 

 doubtful Ibfsils, while a few hundred yards to the Westward simikir aud parallel bands 



