側そく方ほう堆たい積せき

Meanings

1

lateral moraine

Geological term for a ridge of debris deposited along the sides of a glacier. Also referred to as 側堆石.

See also: 側堆石

側そく堆たい石せき
Synonym for 側方堆積; both refer to lateral moraine, but 側堆石 is a shorter form.
堆たい石せき
General term for moraine; 側方堆積 specifies the lateral type.

Compound of 側方 (lateral) and 堆積 (accumulation, deposit), directly describing the geological feature.