Named after the geologist G. D. Louderback, who first described the phenomenon, the term louderback refers to a tilted ridge or slope that’s been capped by a lava flow. In the Basin and Range province, where louderbacks are common, it’s easy to see how the lava flowed onto the surfaces before they were tilted. If it can be established that the lava flow is of late geologic age, there is justification for assuming that associated scarps were produced by faulting.

Antonya Nelson