7
(b) In the chalk-pit east of the Cemetery, 10 feet above the Chalk,
is gravel of phosphatic nodules and bones, flints, &c. The lower part
of the overlying sand may also belong to the Crag.
(c) In the Victoria chalk-pits, 13 feet above the chalk, the
phosphatic nodule-bed is overlaid by brown ferruginous sand, which
possibly contains shells or casts, but is rather inaccessible for study.
(d) The Alexandra chalk-pits have the nodule-bed and some
ironstone, about four feet above the chalk.
(e) A large gravel-pit west of the last touched ironstone and shelly
Crag.
(f) Harding's pit, off East Street, showed ferruginous sand, ten
feet thick, with pebbles and nodules, and sandy ironstone with many
casts and impressions of fossils, amongst which the following have
been found, the two species marked with asterisks retaining their
shells :—
Nassa elongata. Mya arenaria.
Natica occlusa. Mytilus altilis.
Purpura lapillus, var. crispata.* Panopaea ?
Trophon antiquum. Pecten opercularis.
--------- Tellina sp.
Anomia ephippium.* ---------
Cardium parkinsoni. Balanophyllia.
Mactra sp. Pollicipes.
Modiola modiolus.
(g & h) Webb's pits, northwest of the last, had the nodule-bed
two feet above the chalk, and from three to twelve inches in thickness.
Over it was ferruginous sand, pale sandstone with shells of Purpura
lapillus, var. crispata, and layers of ironstone, altogether six feet thick.
4. Between Boxted and Dedham are casual exposures of ironstone
in ditches, &c. On the top of Blackbrook Hill, Langham, a deep
gravel-pit touches shelly Crag, and on the roadside south of it the iron-
stone has impressions of shells. Half-a-mile west of this there is a
gravel-pit with very fossiliferous ironstone.
5. Mistley Park. (a) The gravel-pit in the gardens at the north-
east corner has ferruginous sand and ironstone, with few fossils, and
phosphatic nodules and bones. (b) Laminated ironstone occurs on the
north side of Furze Hill. (c) On the south side, near Oak Grove, and
also in roadside-sections outside the park, descending to the water-
course, are seen laminated ironstone and phosphatic nodules.
Similar ironstone, but in which no shell-impressions or phosphate
were found, occurs in the abandoned Mistley and Thorpe branch rail-
way cutting, near its junction with the Harwich line.
6 Beaumont. Shelly Crag is seen on pond sides near the church,
and (when the crops are away) in the adjacent fields. 117 species are
on record from this small and ill-exposed area.