1 Sentences With "of a former period"

How to use of a former period in a sentence? Find typical usage patterns (collocations)/phrases/context for "of a former period" and check conjugation/comparative form for "of a former period". Mastering all the usages of "of a former period" from sentence examples published by news publications.

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The bench gravels show a thickness of in the upper valleys, where they have been cut through by the streams. Evidences of a former period of glacial activity are seen on all sides in broad-bottomed U-shaped valleys, polished rock surfaces, and transported bowlders. The shores of Turnagain Arm afford frequent proof of ice action in glacial markings and striated pebbles. Hanging valleys are not uncommon.