erratic

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erratic

a piece of rock that differs in composition, shape, etc., from the rock surrounding it, having been transported from its place of origin, esp by glacial action

erratic

[ə′rad·ik]
(geology)
A rock fragment that has been transported a great distance, generally by glacier ice or floating ice, and differs from the bedrock on which it rests.
References in periodicals archive ?
like an erratic boulder, a United church, an intersection, a hamlet; a
During the last ice age a large erratic boulder ended up at Hartburn and was originally used to beat flax.
It locates the key town places and sights linked to Darwin's early life, ranging from birthplace to school to church to The Bellstone, the ancient erratic boulder that so intrigued the future geologist.
Preserved by the Trustees of Reservations, the rock is an enormous erratic boulder, a landmark in the forest where in 1672 Mary Rowlandson of Lancaster - captured in an Indian raid during King Philip's War - was ransomed or ``redeemed'' from her captors.
6: 14-7: 1 fits exactly into the sequence of Paul's kerygmatic and pastoral appeal to the still-disobedient Corinthians, and is no 'foreign body' or erratic boulder or 'kind of meteorite fallen from the Qumran sky' (Benoit) out of place in the flow of 6: 13-7: 2, this piece of writing is to be welcomed and assessed as contributing to at least one enigmatic feature of 2 Corinthians: on what grounds did Paul register his appeal to a disaffected congregation whom he boldly associates with the unbelieving world (Webb's Appendix A) and whom he warns not to persist in compromise with pagans in their temple festivals (Appendix B)?
They found other things of interest to capture at Sibley Farm, including Christmas ferns and a glacial erratic boulder.