- Martha Lake is a census-designated place (CDP) in Snohomish County, Washington, United States. The population was 21,129 at the 2020 census. It lies west of Mill Creek and northeast of Lynnwood, near the lake of the same name.
- Till (Wikipedia)
Till or glacial till is unsorted glacial sediment. Till is derived from the erosion and entrainment of material by the moving ice of a glacier. It is deposited some distance down-ice to form terminal, lateral, medial and ground moraines. Till is classified into primary deposits, laid down directly by glaciers, and secondary deposits, reworked by fluvial transport and other processes.