Allenby Formation

Allenby Formation Stratigraphic range: 52.5–48 Ma PreЄ Є O S D C P T J K Pg N ↓
Type	Geological formation
Sub-units	"Princeton Chert"
Area	300 km².[1]
Thickness	1860-2100 m.[1]
Lithology
Primary	Fluvial deposits
Other	shale–sandstone, coal–breccia, and coal–chert
Location
Coordinates	49°22.6′N 120°32.8′W / 49.3767°N 120.5467°WCoordinates: 49°22.6′N 120°32.8′W / 49.3767°N 120.5467°W
Region	British Columbia
Country	Canada
Type section
Named for	Allenby, British Columbia (Shaw, 1952)

The Allenby formation is a sedimentary rock formation deposited during the early to early Middle Eocene. It consists of conglomerates, sandstones with interbedded with shales and coal. The coal seams contain an abundance of insect, fish and plant fossils.^[1]

The following fossil genera and species have been described from the Allenby formation:

• Acer rousei
• Acer stewarti
• Acer stonebergae
• Acer toradense
• Azolla primaeva
• Dinokanaga wilsoni
• Eriocampa tulameenensis
• Neviusia dunthornei
• Orontium wolfei
• Pseudosiobla campbelli
• Stonebergia^[2]

Orontium wolfei is one example of many fossils that can be found in the Allenby formation.

References

1. Mustoe, G.E. (1 January 2011). "Cyclic sedimentation in the Eocene Allenby Formation of south-central British Columbia and the origin of the Princeton Chert fossil beds". Canadian Journal of Earth Sciences 48 (1): 25–43. doi:10.1139/E10-085.
2. Wolfe, J.A.; Wehr, W.C. (1988). "Rosaceous Chamaebatiaria-like foliage from the Paleogene of western North America". Aliso 12 (1): 177–200.