1. This smooth flowing lava is known as pahoehoe.

2. Pahoehoe lava flows are highly fluid, flowing easily.

3. According to the National Park service, pahoehoe, "a relatively smooth lava, takes its name from the Hawaiian word for 'ropy."

4. This image shows ropy pahoehoe, a type of basaltic lava that forms when solidifying lava meets an obstruction.

5. Pahoehoe lava flows on Kilauea volcano in Hawaii Volcanoes National Park.

6. A segment of pahoehoe at Craters of the Moon that has had the top of its surface broken off, revealing a rust color below.

7. A hornito is a small rootless spatter cone that forms on the surface of a basaltic lava flow (usually pahoehoe).