close

Вход

Забыли?

вход по аккаунту

?

ROGOV M.A. Review of the Upper Volgian ammonite biostratigraphy of Arctic

код для вставки
Review of the Upper Volgian
ammonite biostratigraphy of Arctic
ROGOV M.A. Geological institute of RAS, Moscow
Nordvik
Kheta
Type sections of the Upper Volgian Siberian ammonite zones are located at the Kheta river
basin. Their description (Sachs et al., 1969) was unclear, and information about position of
ammonite records within thick members was missing
Upper Volgian deposits located along the Kheta river now are covered by glacial boulders and
hardly accessible
In addition to Boreal ammonites uncommon taxa of the Mediterranean origin are also known
from the Volgian and Ryazanian of the Kheta river
Okensis Zone of the Kheta river (section no. 22 in Sachs et al., 1969)
Type section of the Taimyrensis zone
(sections 18-19 in Sachs et al., 1969)
Concretions of the Chetae Zone at the basal part of the ?Paleogene Gavrilovo Formation
(section no. 20 in Sachs et al., 1969)
Criteria for definition of zonal boundaries
• Okensis zone: lower boundary defined by FAD and upper
boundary by LAD of Craspedites (C.) ex gr. okensis
• Taimyrensis zone: lower boundary is coincides with LAD of
Craspedites (C.) ex gr. okensis and FAD of C. (Taimyroceras) ex
gr. taimyrensis, upper boundary defined by FAD of Chetaites
chetae
• Chetae zone: its boundaries defined by range of the index
species Chetaites chetae
Okensis Zone, lower part (praeokensis
horizon and its correlatives)
Kachpir
Kheta
Nordvik
Craspedites (C.) praeokensis Rogov (in msc)
Svalbard
Okensis Zone, lower part (praeokensis
horizon and its correlatives)
Kachpurites lineage
Okensis Zone, lower part (praeokensis
horizon and its correlatives)
Spitsbergen
Subpolar Urals
Northern Yakutia, Lena river
Western Siberia
Kachpurites records outside
the Russian Platform
Okensis Zone, lower part (praeokensis
horizon and its correlatives)
Subcraspedites spp
Okensis Zone, lower part (praeokensis
horizon and its correlatives)
NE Russia, Chukotka
Nordvik
Euphylloceras knoxwillensis
Okensis Zone, upper part (okensis
horizon and its correlatives)
Nordvik
Kashpir
Svalbard
Cheremukha river
Craspedites (C.) okensis (d’Orb.)
Okensis Zone, upper part (okensis
horizon and its correlatives)
Garniericeras catenulatum
Kachpurites involutum
Kachpurites subfulgens
Okensis Zone, uppermost part (margaritae
horizon / Originalis Subzone)
Khetoceras margaritae
Khetoceras craspeditoide
Ammonite genus Khetoceras
Okensis Zone, uppermost part (margaritae
horizon / Originalis Subzone)
Western Siberia
Svalbard
Kheta river
Craspedites (Taimyroceras) ex gr. originalis
Okensis Zone
Craspedites sp.juv., Spilsbi
Subcraspedites sp., East Greenland
Subcraspedites sowerbyi, hollotype
Subcraspedites preplicomphalus
Subcraspedites sp., Kashpir
Taimyrensis Zone
Craspedites (Taimyroceras) sp. nov., Svalbard
Craspedites (Taimyroceras) sp. [M], Kheta
Craspedites (Taimyroceras) sp. nov., Nordvik
Taimyrensis Zone
Craspedites (Taimyroceras) taimyrensis, types, Kheta
Craspedites (Taimyroceras) taimyrensis, W.Siberia
Taimyrensis Zone
Craspedites (Trautscholdiceras) aff. nodiger
Craspedites (Trautscholdiceras) plicomphalus, type
Eearly Craspedites (Trautrscholdiceras)
Craspedites (Trautscholdiceras) aff. nodiger
Taimyrensis Zone
Eearly Craspedites (Trautrscholdiceras) spp.
Chetae Zone
Nordvik
East Greenland
Chukotka, NE Russia
Western Siberia
Chetaites chetae Schulg.
Chetae Zone
Ryazan area
Chetaites chetae Schulg.
Berghaus Island, Franz-Josef
Land
Praechetaites cf. exoticus
Laugeites lambecki
Chetaites chetae
Buchia unschensis
Buchia fischeriana
Surites cf. praeanalogus
Chetae Zone
Subcraspedites turbinae, Maurynia river, Subpolar Urals (coll. M.S. Mesezhnikov)
Chetae Zone
Volgidiscus (V.) singularis, V. (Anivanovia) mola
Chetae Zone
Volgidiscus pulcher, HT, Subpolar Urals
Volgidiscus lamplughi, HT
Volgidiscus cf. pulcher, Lincolnshire
Volgidiscus cf.
pulcher,
Shulginites
pseudokochi
(collection & photo
by A. Shkolin,
Moscow)
Upper Volgian correlation chart
Thanks for your attention!
Автор
Nastya
Nastya65   документов Отправить письмо
Документ
Категория
Наука
Просмотров
20
Размер файла
81 994 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа