{"id":36928,"date":"2015-01-02T20:18:38","date_gmt":"2015-01-03T03:18:38","guid":{"rendered":"http:\/\/trgg.ca\/?post_type=dt_portfolio&p=36928"},"modified":"2019-06-26T00:11:07","modified_gmt":"2019-06-26T07:11:07","slug":"tunnel-mountain","status":"publish","type":"dt_portfolio","link":"https:\/\/www.tumblerridgegeopark.ca\/index.php\/project\/tunnel-mountain\/","title":{"rendered":"Tunnel Mountain"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text]<\/p>\n

Hiking Tunnel Mountain
\n<\/strong><\/h3>\n

Tunnel Mountain is a remarkable remote geosite within the Tumbler Ridge Global geopark. While it is best done as a day-trip from Windfall Lake, it can just be done in a very long day from the Windfall Lake trailhead.<\/p>\n

Anticipate a lot of elevation change and alpine ridge walking, where visibility is limited if there is cloud cover. Route finding and navigational skills are essential.<\/p>\n

The easiest way to climb Tunnel Mountain is simply to follow the southeast ridge to the summit, but this omits the enthralling experience of \u201cclimbing through the mountain\u201d, entering at the lower entrance of the Tunnel and emerging higher up the mountain at the smaller upper entrance.<\/p>\n

The final approach to the lower entrance is across and up a steep scree slope. Use caution<\/strong> here in the loose rock.<\/p>\n

There are a number of similar limestone passages in the Tumbler Ridge Global Geopark, but this tunnel is one of the largest and is one of the few that is open at each end (many of the others are choked at one end, or head deep underground). The limestone rocks that form Tunnel Mountain are from the Rundle Formation, and are of Mississippian age.<\/p>\n

 <\/p>\n

Tunnel Mountain Geology<\/strong><\/h3>\nKevin Sharman<\/span>\n

The major structures that make up Tunnel Mountain are a very tight anticline\/syncline pair which are slightly overturned on one limb (photo 1<\/a>), with the cave in the core of the syncline.\u00a0 There are many faults on the limbs of the folds.<\/p>\n

There are two faults that are responsible for the cave\u2019s formation (photo 2<\/a>).\u00a0 The lower of the two faults is slightly above the floor of the upward sloping passage.\u00a0 The bedding flattens above the cave, and it is cut off by the upper fault.<\/p>\n

The cave has been formed in the shattered rock around the faults.\u00a0 The lower fault plane is visible at the upper entrance (photo 3<\/a>).\u00a0 At the lower entrance, there is water seeping along the fault plane, which probably helped to dissolve the rock.\u00a0 Above the cave there is an intensely fractured fault zone with abundant calcite veining (photos 4<\/a> and 5<\/a>).[\/vc_column_text]

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Tunnel Mountain is a remarkable remote geosite best done as a day trip from Windfall Lake.<\/p>\n","protected":false},"author":2,"featured_media":36931,"comment_status":"open","ping_status":"closed","template":"","dt_portfolio_category":[75,81],"dt_portfolio_tags":[],"class_list":["post-36928","dt_portfolio","type-dt_portfolio","status-publish","has-post-thumbnail","hentry","dt_portfolio_category-hiking-destinations","dt_portfolio_category-strenuous","dt_portfolio_category-75","dt_portfolio_category-81","description-off"],"yoast_head":"\nTunnel Mountain - Tumbler Ridge Global Geopark<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.tumblerridgegeopark.ca\/index.php\/project\/tunnel-mountain\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tunnel Mountain - Tumbler Ridge Global Geopark\" \/>\n<meta property=\"og:description\" content=\"Tunnel Mountain is a remarkable remote geosite best done as a day trip from Windfall Lake.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.tumblerridgegeopark.ca\/index.php\/project\/tunnel-mountain\/\" \/>\n<meta property=\"og:site_name\" content=\"Tumbler Ridge Global Geopark\" \/>\n<meta property=\"article:modified_time\" content=\"2019-06-26T07:11:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.tumblerridgegeopark.ca\/wp-content\/uploads\/2015\/09\/Aug-29-2015-068-Large.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1440\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.tumblerridgegeopark.ca\\\/index.php\\\/project\\\/tunnel-mountain\\\/\",\"url\":\"https:\\\/\\\/www.tumblerridgegeopark.ca\\\/index.php\\\/project\\\/tunnel-mountain\\\/\",\"name\":\"Tunnel Mountain - 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