1963C, Helden LXXV borehole, Netherlands (Paleocene to of Netherlands)

Also known as Helden-75

Where: Limburg, Netherlands (51.3° N, 6.0° E: paleocoordinates 48.0° N, 2.3° E)

• coordinate based on nearby landmark

When: Tienen Formation, Late/Upper Paleocene to Late/Upper Paleocene (58.7 - 33.9 Ma)

• This locality is either upper Palaeocene or Palaeocene/Eocene boundary. Downhole of this locality are marine limestones assigned to the Early Palaocene (Montain). The Montain has now been formalized as the Swalmen Member of the Landen Formation.

Environment/lithology: terrestrial

• The borehole is derived from lithologies that include grey, variegated, and sandy clays, fine grained sands, and browncoals (i.e. with 'continental' or 'limnic' aspect).

Size class: microfossils

Preservation: original sporopollenin

Collection methods: core,

• This collection has salviniaceous massulae (Triletes? exiguus), 1 specimen only.

Primary reference: D. J. Batten and M. E. Collinson. 2001. Revision of species of Minerisporites, Azolla and associated plant microfossils from deposits of the Upper Palaeocene and Palaeocene/Eocene transition in the Netherlands, Belgium and the USA. Review of Palaeobotany and Palynology 115:1-32 [R. Lupia/B. Wilborn/B. Wilborn]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34456: authorized by Rick Lupia, entered by Brooke Wilborn on 01.09.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Pteridopsida
 Salviniales - Salviniaceae
Salvinia sp. Adanson
Salviniaceous massulae (Triletes? exiguus)