Assertion: glacier's ice | /r/HasProperty | air
Facets:
Source sentences:
text: Owing to the breaking of layers loosened by sublimation processes, snow compacts faster than firn, while ice compacts more slowly than firn because its pores are closed off, and included air can no longer be freely pressed out of the subsiding ice but is compressed elastically in the enclosed bubbles so that it begins to resist compaction.