What isn deposited or formed during valley glacial advance?Esker, hanging valley, medial or later moraines?
You cannot deposit a valley. An esker is a deposit of glacial drift, as are moraines (both medial and lateral). However the question also says ‘formed.’ Hanging valleys can be formed (by erosion) during glacial advance. Eskers are typically associated with recession, but since they are formed underneath active glaciers (verrrrry dangerous places!), no on can say for sure if they form and remain during advance. Besides, they can be formed during advance, and then the glacier just obliterates them as it moves forward. Its a poorly worded question and there does not appear to be a correct answer (if you transcribed it correctly).
