Kakiddi Formation

The Kakiddi Formation is a stratigraphic unit of Pleistocene age in northwestern British Columbia, Canada.

Kakiddi Formation
Stratigraphic range: 0.31–0.28 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Punch Cone of the Kakiddi Formation with Triangle Dome of the Edziza Formation in the right background.
Type	Geological formation[1]
Unit of	Mount Edziza volcanic complex[2]
Underlies	Big Raven Formation[1]
Overlies	Ice Peak Formation, Nido Formation[1]
Lithology
Primary	Trachyte[1]
Other	Mugearite[1]
Location
Coordinates	57.5°N 130.6°W / 57.5; -130.6[2]
Region	British Columbia[1]
Country	Canada[1]
Type section
Named by	Souther et al.[3]
Year defined	1984[3]
Paleogeological map showing the inferred maximum extent of the Kakiddi Formation at the end of the Kakiddi eruptive period

Name

The Kakiddi Formation is the namesake of Kakiddi Creek, which flows north along the eastern side of the Mount Edziza volcanic complex to the Klastline River. It is also the samesake of Kakiddi Lake where rocks of the Kakiddi Formation are exposed near its western shore.^[4]

Geology

The Kakiddi Formation has a volume of 8.3 km³ (2.0 cu mi), making it one of the least voluminous of the 13 geological formations comprising the Mount Edziza volcanic complex.^[2] It overlies the Ice Peak and Nido formations on the eastern side of Ice Peak and is overlain by the Big Raven Formation at the mouth of Tennaya Creek valley between Nuttlude Lake and Kakiddi Lake.^[1][4]

K–Ar dating of the Kakiddi Formation has yielded ages of 0.31 ± 0.07 million years for mugearite, 0.30 ± 0.02 million years for trachyte, 0.29 ± 0.02 million years for Kakiddi feldspar and 0.28 ± 0.2 million years for pantelleritic trachyte.^[1] This suggests that the Kakiddi Formation was deposited by a short-lived period of volcanic activity during the Pleistocene.^[5]

See also

• Volcanism of the Mount Edziza volcanic complex