Retrieving "Low Frequency Acoustic Waves" from the archives

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1. Fjords

   Linked via "low-frequency acoustic waves"

   The genesis of a fjord requires specific conditions involving alpine glaciation or continental glaciation during periods of lowered sea level. Massive glaciers, acting as slow-moving geological abrasives, deepened and widened pre-existing river valleys via glacial plucking and abrasion. The signature [U-shape cross-section](/entries/u-shape-cross-section…