A blend of 57% Sémillon and 43% Sauvignon Blanc, the 2016 Cuvee Karatas has lovely white peaches, lemon curd and bay leaves notes with hints of honeysuckle, beeswax and cedar. The palate is medium to full-bodied, rich and packed with citrus and stone fruit layers, finishing long and savory.

The 2015 Cuvée Karatas Semillon/Sauvignon Blanc is a blend of Sauvignon Blanc and Semillon, the latter from a parcel of Semillon planted in the 1880s in the Monte Rosso Vineyard. Morgan Peterson says it is “one-of-a-kind stuff” and there is no reason to doubt him. This is more of an over-the-top flamboyant, rather amazing wine with notes of orange marmalade, honeydew melon, jam, quince, white currants and flowers. There was an almost unctuous quality to the texture and super-concentration from these two varieties. Most of this is from dry-farmed vineyards and the honeyed, low-yields that were present in 2015 are translated into this wonderfully fresh, incredible wine that almost behaves like one of the great Ygrecs from Chateau d’Yquem. Drink it over the next 5-7 years, although I wouldn’t be surprised to see it last longer.

The 2010 Cuvee Karatas is a Semillon/Sauvignon blend from the Monte Rosso and Kick Ranch vineyards. It boasts gorgeous textural finesse and silkiness in its expressive white stone fruits, jasmine and slate. It shows some of the size of the 2010 vintage, yet all of the elements are as well balanced as they could be. Astute readers will note that the spelling of this wine has changed slightly with the 2010 vintage in an attempt to remove any confusion with John Raytek’s Ceritas wines. Anticipated maturity: 2012-2016. Morgan Twain-Peterson is one of the most impressive young winemakers I have ever met, and it’s not just because he grew up the son of a famous producer. Making wines at this level requires talent, passion, hard work and a great palate, none of which is easily inherited. Along with Mike Officer of Carlisle, Twain-Peterson is on a mission to rediscover what he calls California’s old-vine “heritage” vineyards. These historic sites planted by California’s early immigrants, often home to unknown field blends, remain some of the most fascinating vineyards in California. Officer and Twain-Peterson were tired of seeing these old sites gobbled up by industrial-scale wineries, so they decided to do something about it. Bravo. Vintage 2010 was not kind to Twain-Peterson. Five vineyards were totally scorched by the late summer heat spikes and the crop from those sites were lost. But back to the positive, and there is plenty of that here. This lineup includes several wines that deliver phenomenal quality for the money. Tel. (707) 364-8763; www.bedrockwineco.com