GSM 2015 July Keweenaw MI - Day 1
Aug 1, 2015Public
Photo: The Michigan Technological University research vessel Agassiz.
Photo: Professor Bill Rose introducing us to the Keweenaw Peninsula and the first day's activities, using a geological map of the peninsula that we would become very familiar with.
Photo: We will spend half of our field trips viewing the Keweenaw Peninsula from the Agassiz.
Photo: Our first cruise on the Agassiz is on Torch Lake, an inland lake on the peninsula.
Photo: Captain Steve Roblee with NPS ranger Karl Larsen, his assistant for the day.
Photo: The small town of Hubbell on the west shore of Torch Lake
Photo: As you can see, it was a beautiful morning to be on the water.
Photo: Field trip participants listen to environmental scientist Noel Urban explain the history, ecology, and environmental concerns of Torch Lake.
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Photo: Noel accompanied us on the Agassiz for the first day of our trip.
Photo: Torch Lake was used as a repository of stamp sands while copper mining was in its heyday on the Keweenaw. The stamp mills were built very near shore so the sands would not need to be transported far before dumping.
Photo: Old photos showing aspects of the mining industry on Torch Lake in the past. From all the smokestacks, you can see much coal was burned for power.
Photo: These photos show Torch Lake in 1938 & 1951. The white areas are where torch sands were dumped into the lake. These areas shifted since with improved recovery processes, the sands were dredged back up and reprocessed to recover more copper.
Photo: Since Torch Lake is relatively small, the light wave action pretty much leaves the stamp sands where they were dumped. Nothing grows on stamp sand. Here, 6 inches of top soil was spread over the sands and planted with grass for park land.
Photo: In a few places, the top soil is deep enough to support some trees.
Photo: The main source of water for Torch Lake is Trap Rock River, which enters on the right side of this photo, after flowing past new land created from stamp sand.
Photo: This is a device for bringing up samples from the lake bottom. Here it is in the open position.
Photo: The open bucket is being lowered to grab a sample. Here by the dock the bottom is only down a few feet, since this is a demo. But the Agassiz has enough cable to lower the bucket to the bottom in most parts of Lake Superior.
Photo: The bucket is being raised with a sample. Captain Steve said that earlier this summer a cancer researcher had taken bacteria samples from deep parts of Lake Superior. These bacteria are then mixed with cancer cells, hoping to find some that fight malignancy.
Photo: Here a rock was caught in the bucket, so it could not close completely.
Photo: Noel is examining what the bucket brought up.
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Photo: This display shows various scenes from the copper mining boom in Lake Linden.
Photo: Old photo of a stamp mill whose ruins we examined. The elevated rail was used to feed copper ore into the top of the mill, so it could flow through by gravity.