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Basalt headlands of the Oregon Coast south from Cape Perpetua, the accreted margin of the Pacific Northwest

The Ocean Beneath the Vineyard: How Geology Built Oregon’s Willamette Valley

The Willamette Valley began as an oceanic lava plateau that slammed into North America 50 million years ago. How Siletzia’s accreted sea floor, the Coast Range, the Columbia River basalts, and the Ice-Age Missoula Floods built Oregon wine country — and its three great soils.

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Row of grape vines in California with mountains in the background, an embodiment of the Napa book experience

Why Does Soil Matter So Much to Fine Wine?

Winemakers obsess over dirt — limestone, gravel, slate, volcanic basalt. But how does what’s under the ground actually reach the glass? The answer is subtler, and more interesting, than “you taste the rocks.” KWWritten & edited by Ken Wytsma, Wine History ToursWillamette Valley wine-tour hosts Soil is one of the pillars of terroir, and growers

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