Ageologist studying rocks in a desert found a special kind of deposit called varves. varves are thin, alternating layers of dark and light sediment that typically form in glacial lakes. because she knows that there are no glacial lakes in her hot, dry field area today, the geologist determines that there was likely a glacial lake there in the past. based on this drastic change in surface features, what can be determined about the local climate history?                                         pleas