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 classic literature ?
At the best, in her most charitable frame of mind, she considered the statement of his views to be a caprice, an erratic and uncalled-for prank.
Throughout a large part of the United States, erratic boulders, and rocks scored by drifted icebergs and coast-ice, plainly reveal a former cold period.
46 deg; erratic boulders have, also, been noticed on the Rocky Mountains.
The train continued its erratic progress, sometimes stopping altogether for a time, with whistle blowing repeatedly; sometimes creeping along the metals as though feeling its way to safety.
It is, however, unnecessary to our narrative to relate the erratic discourse that ensued.
Summary: Speed cameras can cause erratic driving by motorists, according to a new survey.
erRATic--the pet RAT called ERIC had ERRATIC behaviour
Among all types of executives, erratic executives are prone to generating their own minefields or, more likely, failing to recognize existing or potential pitfalls.
A spokesman for the anti-racism group Searchlight said: "We always knew the BNP were an erratic and irrational bunch of people who went around picking fights with each other.
Mr Grady said: "Kazmierczak had stopped taking medication and become somewhat erratic in the last couple of weeks.
THE man who gunned down five people at Northern Illinois University (NIU) in a suicidal rampage became erratic after halting his medication, authorities said.
Contamination or iron left in the sample spoon from previous sample pours will cause erratic measurements.