#TBT: Atop Miners Castle

Atop Miners Castle

Atop Miners Castle, photo by Roger Dinda

On April 13, 2006 one of the most recognizable rock formations in the Pictured Rocks National Lakeshore, Miners Castle collapsed. The Lakeshore explains:

On Thursday morning, April 13, 2006, the northeast turret of Miners Castle collapsed. One turret remains on Miners Castle, the best-known feature of Pictured Rocks National Lakeshore. The collapse was reported via cell phone by fisherman in the area, according to chief ranger Larry Hach. Most of the rock fell north and into Lake Superior, and there were no injuries. The lower overlook platform near Miners Castle appears to be unaffected.

While the rockfall at Miners Castle on April 13 was startling, such events are not rare along the Pictured Rocks escarpment. At least five major falls have occurred over the past dozen years: 1) two different portions of Grand Portal Point, 2) the eastern side of Indian Head just east of Grand Portal Point, 3) Miners Falls just below the (now modified) viewing platform, and 4) beneath the lip of Munising Falls (along the former trail that went behind the cascade).

All the rockfalls involved the same rock unit, the Miners Castle Member of the Munising Formation. Rock units are named for places where they were first technically described. The Miners Castle Member consists of crumbly cross-bedded sandstone that is poorly cemented by secondary quartz, according to U.S. Geological Survey Research Ecologist Walter Loope.

Rockfalls along the cliffs typically occur in the spring and fall due to freezing and thawing action of Mother Nature.

Joel says that this photo was taken Roger Dinda in 1961 or ’62 “…before Pictured Rocks was a National Lakeshore, before Miners Castle lost its second turret, before they put up the boardwalks and railings. In this photo I’m just as tense as I look. I am deathly afraid of heights and this was (still is) about the scariest place I’ve ever been.”

View his photo background big more in his Lake Superior slideshow.

There’s more Throwback Thursdays, more Miners Castle & more from the Pictured Rocks National Lakeshore on Michigan in Pictures!

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