Step-by-step explanation:
Jon M. Erlandson is a famous archaeologist in the University of Oregon. He specializes in anthropology and his research interests included maritime archaeology, coastal adaptations, the impacts of the human in the coastal adaptation and peopling of North America.
Jon Erlanson states the theory of the boats that helped spread of the anatomically modern humans to the coastal regions in America. He founded the Daisy Cave, 12500 BP in channel islands which suggested the use of the boats.
According to his coastal migration theory, he suggested that people had traveled down to Canada coast and also to California with some sort of sea craft most likely.