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)
• Insect bed is about 50 feet above the Bluff coal seam and 50 feet below the Aberdare coal seam. Fossil bed is 15 cm thick. Purdy & Cranfield (2013) reported an unpublished SHRIMP date of 226±2 Ma for the Brisbane Tuff.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, sandy siltstone
•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.
Size classes: macrofossils, mesofossils
Preservation: mold/impression, adpression
Collected by Dunstan & Wilcox in 1915-1916
Primary reference: R. J. Tillyard. 1917. Mesozoic Insects of Queensland No. 1 Planipennia, Trichoptera, and the new order Protomecoptera. The Proceedings of the Linnean Society of New South Wales 42(165):175-200 [M. Clapham/J. Karr]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 111558: authorized by Matthew Clapham, entered by Jered Karr on 25.06.2011, edited by Matthew Clapham
Creative Commons license: CC BY (attribution)