The soil type in Seven Hills West Vineyard breaks down to two types:  The older blocks are planted on Ellingford Silt Loam, which is wind-blown glacial Loess, laid down thousands of years ago as a result of the Missoula Floods.  This soil type is geologically very young, but full of needed nutrients. 

The other type of soil is on the lower plantings that were planted in a cobblestone soils.  This soil is made up of   remnants of ancient river flows through the valley floor, dispersing rounded basalt cobblestones 20-60' deep, with silt loam mixed with the sand, gravel, and cobblestones.