43 
ttOITKN STONE. 
Local situa- 
tion. 
States. 
the toilowing brief statement may not be unacceptable to those 
"who are interested in geological inquiries. 
1. The rotten stone, found on Bakewell Moor, is deposited 
on a lime-stone, which seemingly belongs to the^r5/ or upper- 
most stratum*. 
2. It occurs in different parts of the moor; frequently on 
the surface of the lime-stone, immediately under the vegetable 
mould ; but is procured in the greatest quantity in a long, or 
somewhat trough-shaped hollow, intersected by several broad 
irregular fissures, which are filled up with small fragments of 
lime-stone, the gravel-like debris (rubble) of the traversed 
stratumf. 
3. In these fissures the rotten stone occurs at the depth of 
a few inches below the surface, and from that to ten or fifteen 
feet+. 
4. It is procured in two distinct states. In one, the rotten 
stone, when dry, has an indurated, and sometimes even a stony 
consistence ; te.\ture ; earthy ; fracture, sometimes imperfectly 
Conchoidal ; at other times slaty ; hardness, from that of 
chalk to that w'hich does but just yield to the scraping of the 
knife (3 — O.Kirwan) ; feels smooth, sometimes ra/Aer greasy — 
never so meagre as the foreign tripoli ; does not crumble soon 
in water ; effervesces slightly ^w\th acids; sp. gr. 2, 3. Its 
colour is usually between a brownish grey and isabella-yellow. 
The other variety occurs in a loose or pulverulent form ; feels 
meagre ; rarely effervesces with acids ; sp. gr. 2, 2 ; its co- 
lour light yellow'ish grey. 
5. The hard rotten stone (as the indurated kind is called by 
the rotten-stone getters) occurs in detached, nodular lumps, 
dispersed through the rubble above-noticed; the sofi||, as a 
spongy earth or mud, either coating the more indurated variety^ 
or deposited, in considerable quantities, under the debris, on 
the surface of the lime-stone rock. 
6. Water, from the upper part of the moor, is constantly 
• Vide Note A. f Vide Note B. 
t Vide NoteC. || Vide Note D. 
draining 
