Hempstead Cliff, Hempstead Series (bed 4), Isle of Wight (Eocene of the United Kingdom)

Where: England, United Kingdom (50.7° N, 1.5° W: paleocoordinates 49.2° N, 5.3° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Hempstead Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

• bed thickness is approx. 40 ft, Forbes called this the lower freshwater and estuary marls, and lies directly above the "Black band"

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; concretionary, ferruginous, argillaceous marl and concretionary, ferruginous, shelly/skeletal, blue, argillaceous, carbonaceous marl

• This bed ispale bue and yellow shaly marl, with bands of crushed shells, ironstone concretions( including small fragments of wood). These marls rest upon a thickness of 10 or more ft of dark blue shaly clays with numerous bands of shells. The Hempstead Strata are shales and marls with a variety of colors (green, blue, red, yellow, gray) and some feruginous concretions.

Size class: macrofossils

Preservation: concretion, replaced with pyrite

Primary reference: E. Forbes. 1856. On the Tertiary fluvio-marine formation of the Isle of Wight. Memoirs of the Geological Survey of Great Britain, and of the Museum of Practical Geology 1-162 [J. Alroy/E. Leckey/E. Leckey]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40268: authorized by John Alroy, entered by Erin Leckey on 21.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Ostracoda
 Podocopida - Candonidae
 Podocopida - Cyprididae
Cypris sp. Müller 1776 ostracod
 Podocopida - Cytherideidae
"Cytheridea mulleri" = Cytheridea (Cytheridea) mulleri
"Cytheridea mulleri" = Cytheridea (Cytheridea) mulleri Bosquet 1852 ostracod
Bivalvia
 Mytilida - Mytilidae
"Modiola prestwichii" = Modiolus
"Modiola prestwichii" = Modiolus mussel
 Cardiida - Corbiculidae
"Cyrena semistriata" = Polymesoda subarata
"Cyrena semistriata" = Polymesoda subarata Bronn 1837 clam
"Cyrenae"
 Unionida - Unionidae
Unio spp. Philipsson 1788 freshwater mussel
"Uniones"
Gastropoda
 Architaenioglossa - Viviparidae
 Truncatelloidea - Hydrobiidae
Hydrobia sp. Hartmann 1821 snail
 Sorbeoconcha - Thiaridae
"Melania muricata" = Thiara
"Melania muricata" = Thiara snail
 Sorbeoconcha - Melanopsidae
 Basommatophora - Planorbidae
Actinopteri
 Teleostei -
unclassified
  -
Plantae indet. Haeckel 1866
Monocotyledoneae
 Typhales - Commelinidae
Typha sp. Linnaeus
Limnaea
  -
Limnaea sp. Lamarck 1799
 Coniferae -