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| image = | imagesize = | caption = | type = Geological formation | prilithology = Interbedded Shale & Sandstone | otherlithology = Subordinate limestone units | unitof = | subunits = | underlies = | overlies = | thickness = up to | area = | map = | map_caption = | location | coordinates = | region = | country = | extent = | namedfor = | namedby = | year_ts = | location_ts = | region_ts = | country_ts = | thickness_ts = }} The Ingta Formation is a geological unit containing green sandstones and shales; it crops out in the Canadian Mackenzie Mountains.〔Baudet, D., Aitken, J. D. & Vanguestaine, M. 1989 Palynology of uppermost Proterozoic and lowermost Cambrian formations, central Mackenzie Mountains, northwestern Canada. Can. J. Earth Sci. 26, 129–148.〕 Its age is poorly constrained, though it straddles the Precambrian/Cambrian boundary. Below the boundary its ichnofauna comprises subhorizontal ''Planolites'' burrows; above it, ''Phycodes'' burrows immediately appear, with Nemakit-Daldyn SSFs appearing soon after. == Stratigraphy== The formation is overlain by either the Backbone Ranges Formation and the Vampire Formation, depending on the locality. These two formations have a common base with the Ingta formation, and both continue onwards until the base of the Sekwi Formation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ingta Formation」の詳細全文を読む スポンサード リンク
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