By William Gowland, PSA. P.IC. 5d 























similar materials are found in the Lake District, North Wales, and 
_ Devon and Cornwall. Their absence from the “bluestones” of 
_ Stonehenge, while they are represented in considerable numbers 
among the fragments from the excavations, is doubtless due to 
their fissility and ease of decomposition. Stones of this kind set up 
on edge and exposed to the action of frost could not withstand 
such agencies like the “diabases,” “hornstones,” and “sarsen-stones” 
which constitute the survivors of the Stonehenge assemblage of 
monoliths. There are numerous gradations between the areno- 
argillaceous rocks and the more purely argillaceous flagstones and 
slates. 
VIL. Argillaceous Flagstones and Slates—Among these we have 
a perfect gradation from coarse imperfectly fissile rocks, with more 
_ or less sandy material in their composition, to very pure argillaceous 
‘rocks which may be described as clay-slates. Like the rocks of 
the last group, these flagstones and slates would be especially liable 
to break up under the action of frost, especially when the fissile 
masses were set with their cleavage planes vertical. 
— VIII. Glauconitic Sandstone—A few fragments of a fine-grained 
sandstone with glauconitic grains occurred. A similar rock con- 
taining foraminifera was also among the fragments of which slides 
were sent by Mr. Cunnington to Mr. Teall. These rocks were 
probably Cretaceous in age (Upper Greensand ?). Their presence 
may be accidental, thongh it is just possible that a boulder of this 
kind might have been utilised by the architects of Stonehenge. 
IX. Flints, both in their ordinary condition and whitened or 
bleached condition, occur. These are probably fragments broken 
f the comparatively small excavations made we have come upon 
Az 
a “workshop” where the rude flint-tools were fashioned. It is not 
made at Stonehenge or elsewhere. One of the whitened chalk- 
lints showed in thin sections specimens of Globigerina erctacea, 
with sponge spicules and traces of other fossils. 
