Mint thrives in moist, peaty soils and much of the area was old Columbia River flood plain which had as much as 50 feet of silt deposited over millions of years of annual flooding.
(old Columbia River flood plain; had; as much as 50 feet of silt deposited over millions of years of annual flooding) (as much as 50 feet of silt; deposited; over millions of years of annual flooding) (Mint; thrives; L:in moist, peaty soils) Context(Mint thrives,List([0, 12))):(much of the area; was; old Columbia River flood plain)
Mint thrives,List([0, 12))
old Columbia River flood plain as much as 50 feet of silt Mint much of the area
had deposited thrives was
as much as 50 feet of silt deposited over millions of years of annual flooding
over millions of years of annual flooding
L:in moist, peaty soils
old Columbia River flood plain