Page:Quarterly Journal of the Geological Society of London, vol. 27.djvu/198

 APPENDIX.

Details of General Section of Lower Eocene deposits at Portsmouth (Dockyard Extension Works'), commencing with the highest strata exposed.

feet, inches.

Brownish sandy clay, with thin partings of sand 25 0

Sandy clay 5 4

Sand, with small nodules of claystone 0 3

Brownish sandy clay 4 0

Septaria 0 0

Brownish clay 5 9

Septaria 0 0

Layer of greasy clay 0 2

Stiff greyish clay, with thin partings of sand 5 2

Sand, with pyrites 0 0-1/2

Stiff greyish-brown clay 2 1

Septaria 0 0

Stiff greyish-brown clay 5 6

Sandy clay 0 2

Stiff greyish-brown clay 2 10

Thin layer of Pinna ; crushed, and much decomposed. (These shells appear to have been whole when deposited.) 0 2

Thin seam of greasy clay 0 1

Stiff greyish-brown clay 2 10

Brownish clay, with rounded black flint pebbles 0 10

Greenish sands, finely bedded and interstratified with thin lines of clay and fragments of carbonaceous matter. Fossils numerous 3 0

Layer of greenish chloritous sand, crowded with fossils, and forming the nucleus of a zone of large concretions of shell-rock 0 1

Argillaceous sand, slightly mottled 5 0

Sand, with double band of tabular Claystone or Septaria, containing thin lines of vegetable matter 1 6

Greyish-brown (or greenish-brown) mottled sand, with thin seams of clay 6 0

Septaria, at wide intervals 0 0

Greenish-grey argillaceous sand, mottled and veined with clay 4 6

Layer of finely laminated sand, nearly white when dry 0 5

(This bed is very constant in thickness within the area of the excavations.)

Greyish argillaceous sands, slightly mottled 4 6

Zone of Pholadomya margaritacea.

Zone of Pinna.

Zone of Panopoea.

Zone of Cytherea despecta.

Zone of Panopoea intermediata.

Zone of Cytherea proxima, &c. &c.

Zone of Pholas —.

Zone of Cardium Laytoni and Cytherea suessoniensis, Desh.