The Kakiddi Formation is a

stratigraphic unit A stratigraphic unit is a volume of rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and recognizable petrographic, lithologic or paleontologic features ( facies) that characteriz ...

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

age in northwestern

British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...

, Canada.

Name

The Kakiddi Formation is the namesake of Kakiddi Creek, which flows north along the eastern side of the

Mount Edziza volcanic complex The Mount Edziza volcanic complex ( ; abbreviated MEVC) is a group of volcanoes and associated lava flows in northwestern British Columbia, Canada. Located on the Tahltan Highland, it is southeast of Telegraph Creek and southwest of Dease Lak ...

to the Klastline River. It is also the samesake of Kakiddi Lake where rocks of the Kakiddi Formation are exposed near its western shore.

Geology

The Kakiddi Formation has a volume of , making it one of the least voluminous of the 13

geological formation A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock expo ...

s comprising the Mount Edziza volcanic complex. It overlies the Ice Peak and Nido formations on the eastern side of Ice Peak and is overlain by the

Big Raven Formation The Big Raven Formation is a stratigraphic unit of Quaternary age in northwestern British Columbia, Canada. It is the youngest and least voluminous geological formation of the Mount Edziza volcanic complex (MEVC); it overlies at least eight older ...

at the mouth of Tennaya Creek valley between Nuttlude Lake and Kakiddi Lake.

K–Ar dating Potassium–argon dating, abbreviated K–Ar dating, is a radiometric dating method used in geochronology and archaeology. It is based on the measurement of the product of the radioactive decay of an isotope of potassium (K) into argon (Ar). Potas ...

of the Kakiddi Formation has yielded ages of 0.31 ± 0.07 million years for

mugearite Mugearite () is a type of oligoclase-bearing basalt, comprising olivine, apatite, and opaque oxides. The main feldspar in mugearite is oligoclase. Mugearite is a sodium-rich member of the alkaline magma series. In the TAS classification of volc ...

, 0.30 ± 0.02 million years for

trachyte Trachyte () is an extrusive igneous rock composed mostly of alkali feldspar. It is usually light-colored and aphanite, aphanitic (fine-grained), with minor amounts of mafic minerals, and is formed by the rapid cooling of lava (or shallow intrus ...

, 0.29 ± 0.02 million years for Kakiddi

feldspar Feldspar ( ; sometimes spelled felspar) is a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. The most common members of the feldspar group are the ''plagiocl ...

and 0.28 ± 0.2 million years for

pantelleritic Pantellerite is a type of volcanic rock, specifically a peralkaline rhyolite. It has a higher iron and lower aluminium composition than comendite. It is named after Pantelleria, a volcanic island in the Strait of Sicily and the type location for ...

trachyte. This suggests that the Kakiddi Formation was deposited by a short-lived period of volcanic activity during the

References

{{Mount Edziza volcanic complex Geologic formations of the Mount Edziza volcanic complex Pleistocene British Columbia Pleistocene volcanism Trachyte formations Mount Edziza

Name

Geology

See also

References