
1) Capricious people 2) Eccentric ones
Found on
https://www.crosswordclues.com/clue/erratics

In geology, erratics, or erratic blocks, ARE boulders or large masses of angular rock which have been transported to a distance from their original mountains by the action of ice during the glacial period. Thus on the slopes of the Jura Mountains immense blocks of granite are found which have travelled almost 100 km from their original situation. S...
Found on
http://www.probertencyclopaedia.com/browse/HE.HTM

Seemingly out of place rocks and boulders carried to their present day location by glacial ice and deposited when the ice melted
Found on
https://www.encyclo.co.uk/local/21787
No exact match found.