Relating to or located outside moraine; describing geological features or areas unaffected by glacial moraine deposits.
From Latin 'extra' (outside) + 'morainic' (relating to moraine). A variant form emphasizing the geological context of non-glaciated terrain.
If you're hiking and suddenly the ground changes from boulder-filled to smooth, you've literally crossed from morainic to extramorainic territory—your feet can feel the ice age boundary that vanished 10,000 years ago.
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