The paleo-shorelines at Shoreline Butte developed from ______________ about ___________ years ago. In this fill-in-the-blank, select the best answer. Group of answer choices storm waves eroding the hillside; 140,000 years ago strong gale-force winds eroding the hillside; in the last glacial period about 20,000 years ago a meteor impact took place and splashed material on the side of shoreline butte; 14,000 years ago massive flooding by flash floods; in the last glacial period about 20,000 years ago