 The Ginkgo basalt was examined over its flow path from a Ginkgo flow feeder dike near Kahlotus, Washington to the flow terminus in the Pacific Ocean at Yaquina Head, Oregon.The basalt had an upper melting temperature of and a lower temperature to this indicates that the maximum temperature drop along the Ginkgo flow was 20 °C.The lava must have spread quickly to achieve this uniformity.