Bartolomé – Sullivan Bay
This site is of great geological interest is located south -east of Santiago Island, landing it can be done both on the rocky shore (dry landing) or the white sand beach (wet landing) . The length of the trail is about 1.5 km; travel time is one hour and a half. The area is covered by lava flows Pahohoe type (solidified lava in corrugated or accordion form). He was very active in the last 25 years of the nineteenth century. Sullivan lava formed in 1897. It is a very young geologically flows. The magma formed is flat, but the movement of underground lava, the rapid cooling and other eruptions caused it to break in many places.
These formations have a thickness of 1.5 m and did not cover much of the previous relief forming "kipukas" (Islands with vegetation and surrounded by tidal most recent lava). Islands consisting of reddish-yellow hills protruding from the black lava around them,. These elevations are tuff cone-shaped small volcanoes, similar to ones hornitos and grooves that appeared long before the lava flow. These hornitos are in the nearby sea and the right side of the Red Hill area, were created when lava was still very hot and the gas still in liquid remained trapped in small crevices below the surface of the magma, then eventually the gas output stood out and was washed liquid and glassy pushed to 150m from the trailhead can be found molds of some trees, details of the crust indicate that they were trees growing in small crevices where soil and moisture accumulate in sufficient quantities to be develop
In this site, many geological features have been damaged, especially glass lava bubbles (hornitos). Make sure your visitors do not touch delicate formations, and do not collect anything.
• A 200 m about the landing, you can see molds of vegetation that was burned during the eruption.
• The visit to this area of black lava is magic as the temperature rice and light is better for photographs.