Upper middle section, ZhongBao Grp., SiHuiGou and YongDeng Counties, GanSu Prov. (Ordovician of China)

Where: GanSu, China (37.0° N, 103.0° E: paleocoordinates 25.6° S, 120.7° E)

• local area-level geographic resolution

When: Llandeilo (461.1 - 458.4 Ma)

• ZhongBao Group

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, green, silty sandstone and limestone

• purplish gray breccia with metamorphosed silty sandstone and tuff at top, grayish green arkosic andesite in middle, and light gray to gray limestone and silicates

Primary reference: Stratigraphic Group of Quing Hai Province. 1980. Regional stratigraphic tables of the north western China region: Volume of NinXia Province. Geological Publishing House, Beijing, China [A. Miller/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 8572: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 02.08.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

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Pterobranchia
 Graptoloidea - Diplograptidae
Orthograptus sp.
Orthograptus sp. Lapworth 1873 graptolite
 Graptoloidea - Dicranograptidae
"Dicellograptus sp." = Dicellograptus, "Leptograptus sp." = Dicellograptus, Nemagraptus sp.
"Dicellograptus sp." = Dicellograptus Hopkinson 1871 graptolite
"Leptograptus sp." = Dicellograptus Hopkinson 1871 graptolite
Nemagraptus sp. graptolite
 Graptoloidea - Lasiograptidae
Hallograptus sp.
Hallograptus sp. Lapworth 1876 lasiograptid
 Graptoloidea - Climacograptidae
Climacograptus sp., Pseudoclimacograptus sp.
Climacograptus sp. Hall 1865 climacograptid
Pseudoclimacograptus sp. climacograptid
 Graptoloidea - Retiolitidae
Glyptograptus sp.
Glyptograptus sp. Lapworth 1873 graptolite
 Graptoloidea - Glossograptidae
Cryptograptus sp.