PBDB Collection

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

Show authors, comments, and common names

Polypodiopsida
Equisetales - Equisetidae	Equisetites sp. Equisetites sp. Sternberg 1833 occurs in siltstone
Angiospermae
Ranunculales - Menispermaceae	Menispermites ex gr. septentrionalis Menispermites ex gr. septentrionalis occurs in siltstone
Pinopsida
Pinales - Taxaceae	Cephalotaxopsis intermedia Cephalotaxopsis intermedia yew occurs in siltstone

Coniferales - Cupressaceae	Sequoia ex gr. reichenbachii, Sequoia sp. Sequoia ex gr. reichenbachii coast redwood occurs in siltstone Sequoia sp. Endlicher 1847 coast redwood occurs in siltstone
Coniferales - Podocarpaceae	Elatocladus smittiana Elatocladus smittiana podocarp occurs in siltstone
Equisetopsida
Pinidae - Pinidae	Araucarites anadyrensis, Pagiophyllum triangulare Araucarites anadyrensis occurs in siltstone Pagiophyllum triangulare occurs in siltstone
Gnetopsida
-	Pityophyllum ex gr. staratchinii, "Pityophyllum ex gr. nordenskioldii" = Pityophyllum nordenskioeldi Pityophyllum ex gr. staratchinii occurs in siltstone "Pityophyllum ex gr. nordenskioldii" = Pityophyllum nordenskioeldi Heer 1899 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
Ginkgoopsida
Ginkgoales - Ginkgoaceae	Ginkgo sp. Ginkgo sp. Linnaeus 1771 ginkgo occurs in siltstone