Yelisseev-9 (Cretaceous to of Russian Federation)

Also known as Yelisseev locality, Grebenka flora

Where: Russian Federation (64.5° N, 168.9° E: paleocoordinates 78.6° N, 166.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Krivorechenskaya Formation, Albian to Albian (113.0 - 93.9 Ma)

• uppermost Albian to Cenomanian

• group of beds-level stratigraphic resolution

Environment/lithology: crevasse splay; carbonaceous siltstone

• Sedimentary context:the locality is situated in

•a small gulley formed by stream action.Site 9 is

•located at the base,with sites 10 ^13 at succes-

•sively higher levels up the gulley.Site 9 comprises

•a coarsening-upward succession (Fig.8).At the

•base,an organic-rich,ripple-drift cross-laminated

•and horizontally laminated siltstone occurs,which

•includes rootlets,3D preserved plant remains,and

•invertebrate trace fossils.The siltstone grades into

•a current rippled (A-ripples)and horizontally

•laminated coarse-grained sandstone,with £oating

•large plagioclase grains in a mud matrix at the

•top.This is followed abruptly by massively

•bedded mudstone,and massively bedded coarse-

•grained sandstone.Petrographical evidence and

•sedimentary context suggest that the increasing

•grain-size was caused by increased sedimentation

•on the £oodplain due to in £ux of volcanic ash

•(Figs.4Band 8).

Size class: macrofossils

Primary reference: R. A. Spicer, A. Ahlberg, A. B. Herman, S. P. Kelley, M. I. Raikevich and P. M. Rees. 2002. Palaeoenvironment and ecology of the middle Cretaceous Grebenka flora of northeastern Asia. Palaeogeography, Palaeoclimatology, Palaeoecology 184:65-105 [D. Royer/D. Royer/D. Royer]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 34775: authorized by Dana Royer, entered by Dana Royer on 23.09.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Cephalotaxopsis intermedia
occurs in siltstone
Gnetopsida
  -
Pinopsida
 Pinales - Podocarpaceae
Elatocladus smittiana
occurs in siltstone
 Pinales - Araucariaceae
Araucarites anadyrensis
occurs in siltstone
Pagiophyllum triangulare
occurs in siltstone
 Pinales - Taxodiaceae
Sequoia ex gr. reichenbachii coast redwood
occurs in siltstone
Sequoia sp. Endlicher 1847 coast redwood
occurs in siltstone
Equisetopsida
 Equisetales - Equisetaceae
Equisetites sp. Sternberg 1833
occurs in siltstone
Ginkgoopsida
 Ginkgoales - Ginkgoaceae
Ginkgo sp. Linnaeus 1771 ginkgo
occurs in siltstone
Cycadopsida
 Cycadales -
"Nilssonia serotina" = Nilsonia, "Nilssonia yukonensis" = Nilsonia
"Nilssonia serotina" = Nilsonia cycads
occurs in siltstone
"Nilssonia yukonensis" = Nilsonia cycads
occurs in siltstone
Magnoliopsida
 Ranunculales - Menispermaceae