The Princeton chert: Evidence for in situ aquatic plants

Sergio R S Cevallos-Ferriz, Ruth A. Stockey, Kathleen Pigg

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

The Middle Eocene Princeton chert from southern British Columbia represents one of the richest known assemblages of permineralized Tertiary plants. Affinities with modern aquatic angiosperms, anatomical modifications for the aquatic habit and associated fresh water faunal elements support the interpretation of some components of the Princeton chert as in situ aquatic plants. Among these are fossil plants with affinities to the extent Nymphaeaceae (Allenbya), Araceae (Keratosperma), Alismataceae (Heleophyton), Cyperaceae/Juncaceae (Ethela) and Lythraceae (Decodon). Anatomical modifications include aerenchyma in vegetative tissues (Eorhiza, Dennstaedtiopsis, Heleophyton and Uhlia), the thin-walled tracheary elements without prominent secondary wall thickenings and the presence of protoxylem lacunae surrounded by a ring of cells with thickened inner walls (Heleophyton). Seeds that share morphological features with extant aquatics are characterized by a palisade layer, operculum, external mucilage, small amounts of endosperm and abundant perisperm. Associated faunal elements include turtle bones in the peat matrix and freshwater fish at the top of the section. In situ preservation of these aquatic forms is supported by the presence of rooted axes, the large number of plant organs of the same type and preservation of complete flowers, delicate tissues and organic connections allowing for whole plant reconstruction.

Original languageEnglish (US)
Pages (from-to)173-185
Number of pages13
JournalReview of Palaeobotany and Palynology
Volume70
Issue number1-2
DOIs
StatePublished - Sep 13 1991

Fingerprint

aquatic plant
aquatic plants
chert
Decodon
Alismataceae
Juncaceae
Nymphaeaceae
Lythraceae
tracheary elements
Araceae
mucilages
Cyperaceae
plant organs
mucilage
freshwater fish
turtles
British Columbia
endosperm
peat
Angiospermae

ASJC Scopus subject areas

  • Palaeontology
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

The Princeton chert : Evidence for in situ aquatic plants. / Cevallos-Ferriz, Sergio R S; Stockey, Ruth A.; Pigg, Kathleen.

In: Review of Palaeobotany and Palynology, Vol. 70, No. 1-2, 13.09.1991, p. 173-185.

Research output: Contribution to journalArticle

Cevallos-Ferriz, Sergio R S ; Stockey, Ruth A. ; Pigg, Kathleen. / The Princeton chert : Evidence for in situ aquatic plants. In: Review of Palaeobotany and Palynology. 1991 ; Vol. 70, No. 1-2. pp. 173-185.
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