{{Short description|Geological formation in British Columbia}} {{Infobox Rockunit | name = Kakiddi Formation | image = File:Punch Cone and Triangle Dome.jpg | caption = Punch Cone of the Kakiddi Formation with [[Triangle Dome]] of the [[Edziza Formation]] in the right background. | type = [[Geological formation]]<ref name="Souther"/> | age = {{Fossil range|0.31|0.28}} | period = Pleistocene | prilithology = [[Trachyte]]<ref name="Souther">{{Cite report|last1=Souther|first1=J. G.|author-link1=Jack Souther|title=The Late Cenozoic Mount Edziza Volcanic Complex, British Columbia|work=[[Geological Survey of Canada]]|publisher=Canada Communication Group|series=Memoir 420|year=1992|isbn=0-660-14407-7|doi=10.4095/133497|doi-access=free}}</ref> | otherlithology = [[Mugearite]]<ref name="Souther"/> | namedby = [[Jack Souther|Souther]] ''et al.''<ref name="LCGU">{{cite web|url=https://weblex.canada.ca/html/000000/GSCC00053000458.html|title=Kakiddi Formation|work=[[Lexicon of Canadian Geologic Units]]|publisher=[[Government of Canada]]|access-date=2025-03-23}}</ref> | year_ts = 1984<ref name="LCGU"/> | region = [[British Columbia]]<ref name="Souther"/> | country = Canada<ref name="Souther"/> | coordinates = {{coord|57.5|N|130.6|W|display=inline,title}}<ref name="Edwards">{{cite thesis|last1=Edwards|first1=Benjamin Ralph|degree=PhD|title=Field, kinetic, and thermodynamic studies of magmatic assimilation in the Northern Cordilleran Volcanic Province, northwestern British Columbia|publisher=[[University of British Columbia]]|year=1997|page=10|isbn=0-612-25005-9}}</ref> | unitof = [[Mount Edziza volcanic complex]]<ref name="Edwards"/> | subunits = | underlies = [[Big Raven Formation]]<ref name="Souther"/> | overlies = [[Ice Peak Formation]], [[Nido Formation]]<ref name="Souther"/> | thickness = | extent = | area = | map = File:Kakiddi Formation.png | map_caption = [[Paleogeological]] map showing the inferred maximum extent of the Kakiddi Formation at the end of the [[Volcanism of the Mount Edziza volcanic complex#Kakiddi eruptive period|Kakiddi eruptive period]] }} The '''Kakiddi Formation''' is a [[stratigraphic unit]] of [[Pleistocene]] age in northwestern [[British Columbia]], Canada.

==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.<ref name="Souther2">{{cite map|last1=Souther|first1=J. G.|author-link1=Jack Souther|title=Geology, Mount Edziza Volcanic Complex, British Columbia|map=1623A|scale=1:50,000|type=[[Geological map]]|cartography=M. Sigouin, [[Geological Survey of Canada]]|publisher=[[Energy, Mines and Resources Canada]]|year=1988|language=en|doi=10.4095/133498|doi-access=free}}</ref>

==Geology== The Kakiddi Formation has a volume of {{Convert|8.3|km3|mi3|abbr=on}}, making it one of the least voluminous of the 13&nbsp;[[geological formation]]s comprising the Mount Edziza volcanic complex.<ref name="Edwards"/> It overlies the Ice Peak and [[Nido Formation|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.<ref name="Souther"/><ref name="Souther2"/>

[[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.<ref name="Souther"/> This suggests that the Kakiddi Formation was deposited by a short-lived period of volcanic activity during the [[Pleistocene]].<ref>{{cite journal|last1=Souther|first1=J. G.|author-link1=Jack Souther|last2=Armstrong|first2=R. L.|author-link2=Richard Lee Armstrong|last3=Harakal|first3=J.|title=Chronology of the Peralkaline, Late Cenozoic Mount Edziza Volcanic Complex, Northern British Columbia, Canada|journal=[[Geological Society of America Bulletin]]|publisher=[[Geological Society of America]]|pages=346, 347|volume=95|issue=3|year=1984|doi=10.1130/0016-7606(1984)95<337:COTPLC>2.0.CO;2|bibcode=1984GSAB...95..337S |issn=0016-7606}}</ref>

==See also== *[[Volcanism of the Mount Edziza volcanic complex]]

==References== {{reflist}}

{{Mount Edziza volcanic complex}}

[[Category:Geologic formations of the Mount Edziza volcanic complex]] [[Category:Pleistocene British Columbia]] [[Category:Pleistocene volcanism]] [[Category:Trachyte formations]] [[Category:Mount Edziza]]