The present eruptive cone above was constructed sometime between 40,000 to 10,000 years ago. Since that time the volcano has erupted at least ten times, generally from above . One of the more recent flows issued from South Butte and created the long by wide A.G. Aiken Lava Bed. This flow looks young but has 3,500-year-old Mount St. Helens ash on it, meaning it is at least that old. Of a similar age are the Takh Takh Meadows and Muddy Fork lava flows. The lowest vent to erupt since the main cone was constructed is Smith Butte on the south slope of Adams. The last lava known to have erupted from Adams is an approximately 1000-year-old flow that emerged from a vent at about on Battlement Ridge.