Where: Russian Federation (61.9° N, 172.8° E: paleocoordinates 75.6° N, 116.0° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Late/Upper Berriasian to Late/Upper Berriasian (145.5 - 136.4 Ma)

• Buchia keyserlingi and B. crassicollis as markers

• bed-level stratigraphic resolution

Environment/lithology: basinal (siliceous); lithified chert

Size class: microfossils

Collection methods: bulk, chemical,

Primary reference: V. S. Vishnevskaya and B. L. Murchey. 2002. Climatic affinity and possible correlation of some Jurassic to Lower Cretaceous radiolarian assemblages from Russia and North America. Micropaleontology 48(S1):89-111 [W. Kiessling/W. Kiessling/W. Kiessling] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 51302: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 02.06.2005