How to pronounce“basaltt”in English

volcanic events. The last one didn't cause a mass extinction. It was in thetertiary period. This was in my own home state, Washington State. the Columbia River basults. Out came all this basaltt, this liquid lava, and a lot ofthe carbon dioxide came out too, but not enough to cause the earth to go into a really nasty nasty mass extinction. The mass extinction is caused by the basults