جلاميد منقولة

الجلاميد المنقولة Glacial erratic or Erratic boulder، هي الجلاميد التي تنقلها المثالج، من موضع نشأتها إلى مكان آخر بعيد.

Big Rock in Okotoks Alberta

The Giebichenstein in Stöckse, Germany

Doane Rock, at Cape Cod National Seashore

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 التشكيل

Multiple erratics on the terminal moraine of the Okanagon Lobe. Cascade mountains in the background.

 جلاميد تنقلها الأنهار الجليدية

Two icebergs clearly retain fragments of the moraine (rock debris) that forms a dark line along the upper surface of the glacier. The inclusion of the moraine illustrates how land-based rocks and sediment are carried by ice.

 Ice-rafted erratic

Angular glacial erratic on Lembert Dome.

 جلاميد منقولة كبيرة

Glacial erratic Ehalkivi with overground volume 930 cubic metres (1,220 cu yd) (weight approximately 2,500 metric tons (2,800 short tons)) in Estonia

Area exposed by the retreat of ألاسكا's Steller Glacier in August 1996, the western-most part of Bering Glacier's piedmont lobe. The ground surface is covered by glacial sediment deposited as lodgement and ablation till. The erratic is an angular, 20-foot (6.1 m)-high piece of gneiss. Bering Glacier, Alaska flows through Wrangell-Saint Elias National Park

 أمثلة

 جلاميد تنقلها المثالج

Example of mixed erratics. The boulder in the foreground is basalt. The boulder across the fence is granite.

 انظر أيضا

• Wedgwood Rock
• Precarious boulder
• Grannie stone

 المصادر

• Imbrie, J. & K. P. Imbrie. Ice Ages, Enslow Publishers, Hillside, New Jersey, 1979.

 وصلات خارجية

• Airdrie Erratic
• Cairngorm