201. Karugach Section. East side of the Ayaguz River, about 7 km north of Akchii: Sandbian, Kazakhstan
collected by M. Apollonov

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Odontopleurida - Odontopleuridae
? Diacanthaspis sp. Whittington 1941
Trilobita - Ptychopariida - Shumardiidae
Shumardia aff. extensa Weir 1959
Trilobita - Asaphida - Cyclopygidae
Cyclopyge cf. tereki
Trilobita - Trinucleida - Trinucleidae
Kimakaspis kovalevskyi n. gen., n. sp. Ghobadi Pour et al. 2011
Trilobita - Trinucleida - Dionididae
Dionide sp. Barrande 1847
Trilobita - Trinucleida - Raphiophoridae
? Raphioampyx sp. Baldis and Baldis 1995
Trilobita - Phacopida - Encrinuridae
Dindymene aff. longicaudata Kielan 1960
Pterobranchia - Graptoloidea - Diplograptidae
Diplograptus diminutus
Pterobranchia - Graptoloidea - Climacograptidae
Pseudoclimacograptus scharenbergi (Lapworth 1976)
Pterobranchia - Graptoloidea - Dicranograptidae
Dicranograptus ramosus (Hall 1847)
see common names

Geography
Country:Kazakhstan
Coordinates: 48.0° North, 80.9° East (view map)
Paleocoordinates:10.2° South, 74.0° East
Time
Period:Ordovician Epoch:Late/Upper Ordovician
Stage:Sandbian 10 m.y. bin:Ordovician 4
Key time interval:Sandbian Graptolite zone: Diplograptus foliaceus
Age range of interval:458.40000 - 453.00000 m.y. ago
Stratigraphy
Formation:Karagach Member:Unit 2
Local section:Karugach Local bed:15 m
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: According to Nikitin (1972, p. 206, text-fig. 69), the Karagach Formation overlies a discontinuous sequence of fine siliciclastic rocks belonging to the Middle Ordovician Naiman Formation, and underlies the Upper Ordovician Zhartas Formation, which comprises andesitic volcanic rocks and tuffs with units of volcaniclastic sandstones and argillites. Tsai (1976) estimated the thickness of the Karagach Formation to be over 1200 m, and subdivided it into four informal units (see Figs 2–3) which in ascending order are: (1) limestones about 10 m thick; (2) dark grey siltstones with a few beds of fine-grained sandstones about 200 m thick; (3) alternating sandstones and siltstones about 130 m thick; (4) siltstones about 675 m thick with a few beds of sandstones and calcareous siltstones in the uppermost 30 m of the unit.
Lithology and environment
Primary lithology: sandstone
Secondary lithology: siltstone
Environment:carbonate indet.
Taphonomy
Modes of preservation:cast
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collectors:M. Apollonov
Collection method comments: Some illustrated and referred type specimens are deposited in the F. N. Chernyshev Central Geological Scientific Research and Exploration Museum (CNIGR), St Petersburg.
Metadata
Also known as:35 km east of the town of Ayaguz.
Database number:162194
Authorizer:P. Wagner Enterer:P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2014-09-19 21:46:28 Last modified:2014-09-19 22:15:41
Access level:the public Released:2014-09-19 21:46:28
Creative Commons license:CC BY
Reference information

Primary reference:
52829. M. Ghobadi Pour, L. M. E. McCobb, R. M. Owens and L. E. Popov. 2011. Late Ordovician trilobites from the Karagach Formation of the western Tarbagatai Range, Kazakhstan. Earth and Environmental Science Transactions of the Royal Society of Edinburgh 101:161-187 [P. Wagner/P. Wagner]