The geologic foundation of SeVein was laid millions of years ago in one of the world’s largest lava flows, the Columbia River Basalts, resulting in thousands of feet of dense basalt covering the Inland Northwest. Reworked through the eons by violent uplifting, fragmentation, and subsequent ice-age floods, these rolling hillsides were then gently frosted with layers of wind-deposited loess. In the last three decades, man has begun to grace her slopes with vineyards capable of producing some of the finest wines in the world.
The predominate soil type is Walla Walla Silt Loam; however, Lickskillet Very Stony Loam punctuates the basalt ridgelines throughout SeVein. Windblown loess drapes the basalt underlayment at the upper elevations. Alluvial sedimentations are laced in eddies, basins and throughout the landscape below 1,200 feet. Slopes vary from 1 to 40 percent, accentuate air drainage, and provide various solar aspects.
