1. A block of stone supported above the surface of a glacier on a pedestal of ice

https://www.merriam-webster.com/dictionary/glacier%20table

2. A rock that resides on a pedestal of ice; formed by differential ablation between the rock-covered ice and surrounding bare ice

https://nsidc.org/cryosphere/glossary-terms/glaciers?page=10

https://earthobservatory.nasa.gov/Features/PaintedGlaciers/page3.php