162 WILMOEE : THE STRUCTUKE OF SOME CRAVEN LIMESTONES. 
{a) Salt Hill. This is a low rounded hill, now partly re- 
moved by quarrying. The limestone is for the most part a 
well-bedded greyish-white crinoidal debris, containing broken 
and rolled shells. The stems and plates of crinoids and the 
shells weather out from the massive limestone on long exposure. 
There is abundant iron oxide in parts, and the limestone some- 
times weathers to a clay of a brownish-yellow colour. There are 
layers of light blue very fine-grained limestone, with occasional 
megascopic fossils in excellent preservation. This quarry has 
been one of the favourite collecting grounds for Cephalpods, 
Euomphalus, Spirilers, and other Brachipods. 
(6) Bellman Quarry Hill is of inconsiderable height, but 
forms a low rounded knoll. It consists largely of crinoidal 
debris, sometimes quite well bedded, sometimes obscurely 
bedded. The same plates and stems weather out as on Salt 
Hil], and cups or heads are quite plentiful. Shells sometimes 
come out on weathered masses in great perfection. There is 
the same iron- oxide and weathering of the limestone to a brown 
clay. Stalagmitic deposits are quite good. There is a remark- 
able breccia made up of fine-grained pieces of limestone and 
crinoidal fragments mixed together. This breccia is inter- 
bedded with the ordinary crinoidal and shell limestone. 
(c) Worston Hill shows more of the knoll character ; it 
rises somewhat sharply from the plain of Pendleside shales, 
and has the familiar rounded appearance. There is the same 
crinoidal debris, with the same rolled shells weathering out 
perfectly on long exposure. There is the same breccia, this 
time in greater abundance ; at least I have seen more of it, 
and it is again clearly interbedded with the irregularly stratified 
crinoidal and shell debris. 
(d) Worsaw is the highest and by far the most conspicuous 
of the series. It rises to a height of 725 feet above Ordnance 
datum, or more than 300 feet above the neighbouring plain. 
There is again the crinoidal and shell debris, sometimes quite 
well bedded, sometimes very obscurely bedded. Occasionally 
the limestone may be described as flaggy. The dips in this 
and in the knolls ot Salt Hill, Bellman, and Worston are fairly 
consonant. They are almost uniformly towards the plain, 
