Denmark Hill Insect Bed Stratigraphic range: Carnian | |
---|---|
Type | Geological formation |
Unit of | Blackstone Formation |
Underlies | Bluff coal seam |
Overlies | Aberdare coal seam |
Thickness | 15 cm (5.9 in) |
Lithology | |
Primary | Shale |
Location | |
Coordinates | 27°36′S152°48′E / 27.6°S 152.8°E Coordinates: 27°36′S152°48′E / 27.6°S 152.8°E |
Approximate paleocoordinates | 59°00′S105°48′E / 59.0°S 105.8°E |
Region | Ipswich |
Country | ![]() |
Type section | |
Named for | Denmark Hill |
The Denmark Hill Insect Bed is a Triassic fossil locality in the Denmark Hill Conservation Park of Ipswich, Queensland, Australia. [1] [2]
It belongs to the Blackstone Formation (Ipswich Coal Measures Group) dated to the Carnian age (228.0 - 216.5 million years ago). Its coordinates are 27°36′S152°48′E / 27.6°S 152.8°E . Its paleogeographic coordinates are 59°00′S105°48′E / 59.0°S 105.8°E . [3]
The fossiliferous layer is located in between the Bluff coal seam and the Aberdare coal seam. It is 15 cm (5.9 in) thick and is composed greenish grey to brownish grey arenaceous shale. The existence of coal seams above and below the layer indicates that it may have once been a lake (lacustrine environment). [3]
The site is noted as a source of well-preserved insect fossils. [1] [4]
The Los Colorados Formation is a sedimentary rock formation of the Ischigualasto-Villa Unión Basin, found in the provinces of San Juan and La Rioja in Argentina. The formation dates back to the Norian age of the Late Triassic.
The Ischigualasto Formation is a Late Triassic fossiliferous formation and Lagerstätte in the Ischigualasto-Villa Unión Basin of the southwestern La Rioja Province and northeastern San Juan Province in northwestern Argentina. The formation dates to the Carnian age and ranges between 231.7 and 225 Ma, based on ash bed dating.
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The Blackstone Formation is a geologic formation of the Ipswich Coal Measures Group in southeastern Queensland, Australia, dating to the Carnian to Norian stages of the Late Triassic. The shales, siltstones, coal and tuffs were deposited in a lacustrine environment. The Blackstone Formation contains the Denmark Hill Insect Bed.
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The Talampaya Formation is an Early Triassic (Olenekian) geologic formation in the Ischigualasto-Villa Unión Basin of La Rioja Province in northwestern Argentina. The pink to red sandstones of the formation represent the oldest sedimentary unit in the basin, overlying basement rock and were deposited in a high-energy braided river environment. Ichnofossils, probably left by an archosaur chirotherian, were found in the formation. The formation crops out in the Talampaya National Park, which was designated a UNESCO World Heritage Site in 2000.
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