Denmark Hill, Bed H (Simmonds collection) (Triassic of Australia)

Where: Queensland, Australia (27.6° S, 152.8° E: paleocoordinates 58.6° S, 101.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Blackstone Formation (Ipswich Coal Measures Group), Norian (228.0 - 208.5 Ma)

• Purdy & Cranfield (2013) reported an unpublished SHRIMP date of 226±2 Ma for the Brisbane Tuff. Therefore, the Blackstone Formation may be considered younger than 226 Ma in absolute age. Thus, the Ipswich Coal Measures above the Brisbane Tuff, which is to say, the succession from the Mount Crosby Formation to the top of the Blackstone Formation must now be considered Norian.

• bed-level stratigraphic resolution

Environment/lithology: pond; lithified, gray, sandy siltstone

• Interbedded sandstones and mudstones accumulated on levees bordering channels and graded laterally into floodplains where carbonaceous mudstones accumulated with thin crevasse splay sandstone beds.

•Ipswich basin; transtensional rift in intermontane setting. Basin geometry affected by strike-slip movement along West Ipswich fault. Ipswich coal measures deposited near end of rifting phase.

• 15 inches thick and made up of a very slightly weathered dark greyish shale.

Size classes: macrofossils, mesofossils

Preservation: mold/impression, adpression

Collected by Simmonds

Primary reference: R. Etheridge and A. S. Olliff. 1890. The Mesozoic and Tertiary insects of New South Wales. Memoirs of the Geological Survey of New South Wales, Palaeontology 7:1-12 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 111854: authorized by Matthew Clapham, entered by Jered Karr on 29.06.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• impressions are less fragmentary than bed E
Show authors, comments, and common names
Insecta
 Coleoptera -
Etheridgea australis n. gen. n. sp.
Etheridgea australis n. gen. n. sp. Handlirsch 1906 beetle
GSQI S4
 Coleoptera - Buprestidae
Mesostigmodera typica n. sp.
Mesostigmodera typica n. sp. Etheridge and Olliff 1890 jewel beetle
GSQI S5
 Coleoptera - Trachypachidae
"Ademosyne minor n. sp." = Ademosynoides minor
"Ademosyne minor n. sp." = Ademosynoides minor Handlirsch 1906 false ground beetle
GSQI S3
 Coleoptera - Ademosynidae
Ademosyne major n. sp., "Pseudorhynchophora olliffi n. sp." = Ademosyne olliffi
Ademosyne major n. sp. Handlirsch 1906 beetle
GSQI S2
"Pseudorhynchophora olliffi n. sp." = Ademosyne olliffi Handlirsch 1906 beetle
GSQI S1