Beach Rambles in Search of Seaside Pebbles and Crystals: With Some Observations on the Origin of the Diamond and Other Precious StonesFrancis, John George
Science
Beach Rambles in Search of Seaside Pebbles and Crystals: With Some Observations on the Origin of the Diamond and Other Precious Stones
PLATE I.
Fig. 1. This is a slice from a lump of “conglomerate” found on the beach
at Sidmouth. The _white_ parts are sections of the nodules of quartz, the
_red_ and _yellow_ are jasper.
Fig. 2. A section of an “Alcyonite” from the bay of Sandown. It formed
part of a large pebble.
PLATE II.
Fig. 1. This is, I have no doubt, a fossil “Actinia.” I have often
looked on the exact living resemblance of it at the fish-house in the
“Zoological Gardens,” where it is fond of clinging like a limpet against
the vertical pane of glass in an aquarium.—(_Found in Sandown Bay._)
Fig. 2. I suppose this half of a pebble to represent the internal
structure of some creature which dwelt in a bivalve shell.—(_Sandown
Bay._)
PLATE III.
Fig. 1. This sponge, a faultless specimen of the kind, is from the
Brighton beach. It was the first pebble I ever picked up there.
Fig. 2. The body and arms of this Choanite are in white Agate; the
remainder of the stone is a dark moss, formed chiefly of _Manganese_, and
surrounded by a yellow flinty rim.—(_Brighton Beach._)
PLATE IV.
Fig. 1. A Nondescript: but, probably, the creature was of the vermicular
kind.—(_Brighton Beach._)
Fig. 2. A handsome Choanite, uncut, but polished over, so as to show the
points of some of the feelers.—(_Found at Eastbourne._)
PLATE V.
Fig. 1. An “Eyed” Jasper, from the beach near Shoreham. It contains
yellow “oxide of iron,” and some dark green flint.
Fig. 2. A “Myriapod.” This fossil is a very handsome one, and I have
another, closely resembling it, from the same locality, in Sandown Bay.
The dark, reddish spot, is of the nature of _Molluskite_.
PLATE VI.
Fig. 1. A Spindle, or _Fusiform_ Choanite, when the pebble was entire.
I do not possess a more perfect specimen: the Chalcedony is remarkably
fine, and the “oxide” of a rich tint.—(_Sandown Bay._)
Fig. 2. Pyriform Choanite, uncut. Here, again, the creature lies over the
surface; and, as I conceive, from the position which it occupies, was
swimming for its life.—(_Found at Rottingdean._)
PLATE VII.
Fig. 1. An “Asterid.” This is different from all the other creatures in
these fossils. Its position in the heart of a solid limestone pebble is
singular.—(_Beach at Hove._)
Fig. 2.—“Terebratula.” The entire pebble was formed inside of a
“Pecten”-shell, and _inside the pebble_ lies this formation, which was a
living organism connected with the hinge.—(_Beach near Luccombe._)
EXPLANATION OF CERTAIN TERMS used in this Volume.
“Hard:” that which will cut or scratch other substances.
_Example._—A diamond will cut glass.
“Tough:” tenacious; whose particles are difficult to separate
from one another.
_Example._—Jasper, though not nearly so _hard_, is more
“tenacious” than diamond.
“Transparent:” through which we can see objects.
“Translucent:” through which we see light.
“Opaque:” through which we can see nothing.
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