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It took twelve years, but the Opportunity Rover has climbed up the edge of Knudsen Ridge on Mars. The view is great — steep ridges, a dramatic slope, and the far lip of¬†Endeavour Crater shaping the horizon. The rover is … Continue reading

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Characterizing Radioactivity

Detection of radioactivity depends on the type of radiation being targeted. Geiger Counters Gieger counters are short tubes filled with a low-pressure mixture of gas with electrodes maintained at a large potential difference. When radiation entered through the window, the … Continue reading

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Literal GeoSign

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Lytton, BC is home to the only geosign I know of that is actually a sign made of geology. The jellyroll is a geologic structure made by a submarine slump. This monstrous example was uncovered at a local gravel mine, … Continue reading

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Geo’s Sign

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Today, I offer a geosign for the July Accretionary Wedge created by geoscientists and geographers: Geophysical surveys involve a lot of trying to figure out where you took measurements in relation to where you want data. In mountainous, forested, cloudy … Continue reading

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GeoSigns: Tanzania

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Continuing my temporary obsession with using the July Accretionary Wedge to dig through my photo collection, the signs in Tanzania regularly made me burst out laughing. A few favourites: 1. Signs in the Wilderness Driving 6 hours from town to … Continue reading

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Permanent Guide

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I’m getting a bit carried away with the July Accretionary Wedge on geologic and geographic signs. When visiting tourist attractions, I take photographs of the signs to identify where the subsequent photos are from, and to capture the popularly-accepted geologic … Continue reading

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Iconography of Disaster

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The July Accretionary Wedge on geologic and geographic signs gave me the excuse to finally share my collection of warning signs. I have a soft spot for the iconography of disaster, and the difficulty of sharing vital information in a … Continue reading

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Recreational Geophysics (winter edition)

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When hunting for snowshoes in the equipment room, I discovered snowboards and skis. I am now utterly enchanted by the concept of a downhill geophysical survey. If we blend in some techniques from urban skiing in small town British Columbia, … Continue reading

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Volcanism on the Sea-to-Sky Highway

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The Sea-to-Sky between Vancouver and Whistler showcases some gorgeous geology. Volcanics cut into fjords by glaciers lead to epic landslide hazards (and equally epic mitigation measures), but north of Squamish the terrain is a bit less harsh and the lava … Continue reading

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Field Photo: Ice Columns

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Hexagonal columnar prism, the most basic form of a snow crystal. The six-fold symmetry is the consequence of the shape of water bonds; the facets managed to form so clearly due to very slow crystal growth. I dug this chunk … Continue reading

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