TY4-6, Gevar'am 2 Well (Cretaceous to of Israel)

Where: Southern Coastal Plain, Israel (31.6° N, 34.6° E: paleocoordinates 9.8° N, 28.7° E)

• coordinate based on nearby landmark

When: Talme Yafe Formation, Late/Upper Albian to Late/Upper Albian (105.3 - 93.5 Ma)

Environment/lithology: marine; lithified, gray, argillaceous, carbonaceous mudstone

• The Gevar'a m Formation occurs in the lower part of the Cretaceous sequences that was studied. It unconformably overlies limestone beds considered to be of Jurassic age (Derin, 1966). In the Gevar'am 2 well the formation consists of 942 meters of dark gray, carbonaceous, marine shales with occasional thin sandstone beds. To the east there is a rapid facies change and in the Helez area most of the marine shales grade laterally into shallow water arenaceous sediments (Shenhav, 1970), which are referred to as the Helez Formation. Correlation between the less argillaceous sediments of the Helez Formation and the shales of the Gevar'am Formation has not, as yet, been established paleontologically.

•In the Gevar'am 2 well, at 1500 m the Gevar'am Fm. is overlain by 700 meters of light to medium gray marine mudstone called the Talme Yafe Formation. The nature of the contact between these two formations is still an open question.

•The rapid vertical change from a carbonaceous shale to a light gray marlstone sequence may represent an unconformable relationship or only a rapid change in the depositional environment.

Size class: microfossils

Preservation: soft parts, original sporopollenin

Collection methods: chemical, hydrochloric, hydroflouric, sieve

Primary reference: G. J. Brenner. 1974. Palynostratigraphy of the Lower Cretaceus Gevar'am and Talme Yafe Formations in the Gevar'am well (Southern Coastal Plain, Israel). Bulletin of the Geological Survey of Israel 59:1-27 [C. Jaramillo/G. Doria/A. Cardenas ]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 144149: authorized by Carlos Jaramillo, entered by Gabriela Doria on 01.05.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Baltisphareidium "sp. 1", Hytrichosphaera ramosa, Gonyoulucysta "sp. 1", Hystrichokolpomo ferox
Dinoflagellata
 Hystrichosphaeridea -
Hystrichosphaera cingulatagranula
Dinophyceae
 Gonyaulacales - Gonyaulacaceae
Chytroeisphaeridia sp.
Chytroeisphaeridia sp. Downie et al. 1963
 Gonyaulacales - Areoligeraceae
Cyclonephelium sp.
Cyclonephelium sp. Deflandre and Cookson 1955
 Gonyaulacales - Goniodomaceae
Hystrichosphaeridium mantelli, Hystrichosphaeridium "sp. 2", Hystrichosphaeridium "sp. 4", Hystrichosphaeridium "sp. 5"
 Gonyaulacales -
Tanyosphaeridium "sp. 1", Tanyosphaeridium "sp. 2"
Tanyosphaeridium "sp. 1" Davey and Williams 1966
Tanyosphaeridium "sp. 2" Davey and Williams 1966
 Life -
Baltisphaeridium "sp. 5", Baltisphaeridium "sp. 6", Baltisphaeridium cratoechinatum
Baltisphaeridium "sp. 5" Eisenack 1958 acritarchs
Baltisphaeridium "sp. 6" Eisenack 1958 acritarchs
Equisetopsida
 Pinidae - Pinidae
Classopollis torosus
Pinopsida
 Pinales - Taxaceae
Podocarpites sp.
Podocarpites sp. Andra 1855 yew
 Coniferales - Podocarpaceae
"Tsugaepollenites "sp. 1"" = Callialasporites
"Tsugaepollenites "sp. 1"" = Callialasporites Sukh-Dev 1961 podocarp
Cycadopsida
 Gnetales -
Elaterocolpites castelani
Elaterocolpites castelani Herngreen 1973 elaterate
Pteridopsida
  -
Cingulatisporites sp.
Cingulatisporites sp. Thomson et al. 1953
Converrucosisporites
  -
Converrucosisporites sp.
Converrucosisporites sp. Potonié and Kremp 1954
 Life -
Leiosphaeridia sp.
Leiosphaeridia sp. Eisenack 1958