An absolutely beautiful project.
"Langjøkull, Snaefellsjøkull, Solheimajøkull" by Katie Paterson is ice records made from ice from three glaciers in Iceland. They are played until they melt.
The sound recordings are field recordings from each glacier melting. The sound records is then made by casting the record of each field recording (the vinyl shape) in silicon and made by freezing the meltwater in the forms. The records are then played on three turntables until they melt. This takes nearly two hours.
The ice is played and the sound you hear at the start is the first melting of the water while at the same time you can hear the ice dissolving melting the water a second time around.
You can hear the sound here at Katie Paterson's website.