488 
THE GEOLOGIST. 
Kame. Localities, 
Ecliinobrissus Griesbackii, Wright Blisworth. 
Clypaus Plotii, Klein ... ... Blisworth, &c. 
„ Miilleri, Wright ... ... Gay hurst quarry. 
Corals, various. Blisworth, "Woolaston, <fec. 
Many of the mollusca occur merely in the form of casts ; some how- 
ever, are well preserved, and generally entire j but on the weathered 
sides of many blocks of Great Oolite, portion of shells, plates and 
spines of Echinites, star-like portions of the stems of Pentacrinites, 
together with worm-tracks and Serpulse, are common enough. In 
many of the quarries, before reaching the good workable beds of 
freestone or hard limestone, a marly bed has to be cut through ; this 
bed is full of shells and Nucleolites clunicularis and other echinoderms. 
In a word, the Great Oolite is by far the most fossiliferous formation 
of the district. Though this is its general character, yet miles in 
extent of hard bluestone, with scarcely a vestage of a fossil, save at 
most a few oyster- shells, extends over the high ground east of 
Road station ; and what few fossils there are, are usually in a 
fragmentary state, bearing evidence of having been drifted by currents. 
The Lower Zone next claims our attention, " the Northampton 
sand" equivalent, as I before stated, with the Stonesfield slate, but 
remarkably opposite to that formation in one respect, namely, that 
whereas that is full of organic remains — plants, molluscs, echinites, 
and fish, — this can scarcely boast of more than a dozen species (found 
at least as yet). The Northampton sands consist of ironstone, sands, 
sandstones, and slaty limestones, spreading over a large tract of 
country west and south-west of the town of Northampton. 
The Northampton sands are used as an iron ore to a gi'eat extent, 
as they are peculiarly rich in the hydrated oxide : 74,084 tons of this 
ore were raised in the year 1855, and sent into Staffordshire to be 
smelted ; but since that time furnaces have been erected near 
Weedon for smelting. The flaggy Oolitic stone belonging to this . 
formation greatly resembles in appearance the Stonesfield slate, and 
what organic remains have been found, resemble those of Stonesfield 
still more closely than those of the Lias or Inferior Oolite. Although 
allied to the Great Oolite, there is no passage between them, but the 
sandstone rests on the Great Oolite quite unconformably. 
List op Fossils from the Northampton Sand. 
Name. Localities, 
Megalosaurus Bucklandi, Mey. . . . Duston stone pits. 
Bones of Dinosauria ... ... Duston stone pits. 
Belemnites corapressus, Sow. ... Duston stone pits. 
Cardium Buckmanii, Z?/c. ... Duston. 
Hinnites velatus. Gold/. ... Duston. 
Pecten (small sp.) ... ... ... Duston. 
Trigonia Moretonis, Lyc. and Mor. Duston, Danes* Hill. 
„ costata, Sow. ... ... Gay ton, Danes' Hill. 
