Brent Ward Profile picture
SFU Earth Sciences, Quaternary Geologist, Cordilleran Ice Sheet, purveyor of Natural Hazards, Long suffering Canucks fan, loves woolly mammoths (he, him, his)

Mar 24, 2019, 8 tweets

1/ Spent an enjoyable Friday (March 15) with the amazing Dr. Corinne Griffin on the EASC 403 Quaternary Geology Sea to Sky Fieldtrip. It covers glacial geology and, naturally, Natural Hazards. #SFUNaturalHazards #SFUGlacialGeology

2/ Charles Creek Debris flow retention structure. Poor land use decisions (not recognizing debris flow hazard on fan deltas) resulted in deadly consequences followed by construction of several types of debris flow protection structures. They work.

3/ Porteau Cove. Area of shallow water because of a submarine moraine, makes this a good site for a ferry dock and diving. Day lighting joints along road can lead to rock fall issues, such as happened in July 2008. Caused a bit of a kerfuffle in terms of the Olympics.

4/ Britannia beach delta. Most of gravel now gone but still some bottom sets, includes molds of shell confirming marine conditions.

5/ Mamquam Delta. Great example of a gilbert style delta that resulted from a younger dryas readvance of glaciers down the Squamish Valley, forming a lake in the Mamquam, that then overtopped the site.

6/ Checkay fan/dike. Development on the Chekeye Fan is constrained by the potential of Debris flow hazard and flooding hazard. This dike is in repose to the flooding hazard. Floodwater have come close to overtopping this dike.

7/ Streamlined bedrock. Located right across from Stawamis Chief this outcrop shows evidence of both basal glacial erosion and meltwater erosion. Great discussions.

9/ This weekend the group is in the scablands! Wish I was there!

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