Well, it’s Summer — and Wednesday, a bit late for the Wine of the Week, sorry — and we need a wine that’s crisp, bracing, racy, filled with nerve and energy, so I’m thinking sauvignon blanc and the eastern Loire Valley, where the soil rests atop vast reaches of limestone dense with marine and shell fossils deposited some 150 million years. You think this Jurassic Park of mineral plenitude doesn’t lend character to the grapes and the wines made from them? Think again, Grasshopper! The best-known region, perched on the east bank of the Loire River, is Sancerre, easy to pronounce, easy to find, but a wine whose popularity has driven up the price. Let’s look instead inside the great curve that the Loire makes here to a lesser-known appellation called Reuilly (“roo-ee”), one of several Sancerre “satellite” appellations clustered about the city of Bourges on the Cher, a tributary of the Loire. Reuilly was granted AOC status early, in 1937, for white wines made from sauvignon blanc; in 1961, red and rosé wines made from pinot noir and pinot gris were added. Today we look at the Domaine de Reuilly Les Pierres Plates 2012. The domaine goes back to 1935, when Camille Rousseau, the grandfather of present proprietor Denis Jamain, first planted vines. The estate, certified organic in 2011, consists of 17 hectares (about 42 acres), 11 planted to sauvignon blanc, 4 to pinot noir and two to pinot gris. Annual production is about 11,000 cases. As the name implies, Domaine de Reuilly Les Pierres Plates 2012 derives from a specific vineyard whose sauvignon blanc grapes go only into this wine. The color is pale straw-gold; the bouquet is a fragrant but very subtle amalgam of roasted lemon and lemon balm, freshly mowed grass, a touch of hay, spare hints of jasmine, pear and juniper and pungency driven by a profound limestone and flint element. What did I assert as the requirements in the first sentence of this post? A wine that’s crisp, bracing, racy, filled with nerve and energy, and boy does this model fulfill those parameters. This is very dry, crisp and lively, a wine animated by vivid acidity and the scintillating presence of limestone-based minerality; it feels cleansing, lithe and chiseled, yet, for all that, exceedingly pleasant and inviting, with real personality. At 12.5 percent alcohol, you could drink a bunch, sitting out on the porch or patio, with a hunk of goat cheese and slices of crusty bread or a platter of grilled shrimp. Now through 2015 or ’16. Excellent. About $20.

Imported by Kermit Lynch, Berkeley, Calif. Tasted at a trade event.