Layer Cake Hill - Kelowna, BC - Places of Geologic Significance on Waymarking.com

Long thought to be the result of individual layers of volcanic deposition, it is now believed to be a single thick layer, the layering being the result of a peculiar way in which the rock shrinks as it cools. It has been compared to a similar formation in New Zealand which has undergone extensive study.

From: (visit link)
"Kelowna boasts a totally unique formation unlike any other identified on earth. The view of Layer Cake as one rounds 8 Mile Corner on the way to the City from Big White Mountain is striking. Or hike the Greenway Trail for a most imposing view from the bottom up. There's nothing else like this anywhere!"

From Mineralogical Magazine: (visit link)
"A Tertiary, dacitic volcanic land-form in Kelowana, British Columbia, shows layering that has not been recognized elsewhere. Layering is expressed as thin (0.5 m) layers separated by thick (4.5 m) layers exposed along a weathered fault scarp. The major elements show that both thick and thin layers are dacitic and geochemically very similar. Trace element modelling indicates that thin layers formed from thick layers via crystal fractionation involving removal of plagioclase, biotite and magnetite in the proportions 75:20:5, and with only 12% fractionation. The thin layers represent segregation veins generated during crystallization of the dacite. They formed when the crystal mush at the bottom of the upper crust successively, thermally contracted, fractured and foundered, siphoning evolved interstitial liquid from the mush into the horizontal crack. Cooling of the segregation veins led to further fracturing. Later, fluids following these fractures altered the thin layers and precipitated secondary carbonate minerals. The altered thin layers weather preferentially, thus visually accentuating the small primary chemical differences between thick and thin layers. The scale of layering, mode of formation and differentiation mechanisms appear different from those in felsic magma chambers and it is unclear how common this phenomenon is. However, similar layering is more easily identified and commonly developed in mafic lava flows."

Waymark is confirmed to be publicly accessible: yes Parking Coordinates: N 49° 50.186 W 119° 21.245 Access fee (In local currency): .00 Requires a high clearance vehicle to visit.: no Requires 4x4 vehicle to visit.: no Public Transport available: no Website reference: [Web Link]

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Date Logged Log User Rating   04/01/2013 dronnord visited it

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