Lava Tree Earthcache EarthCache
Hidden : 1/6/2012
Difficulty:
1.5 out of 5
Terrain:
1.5 out of 5

Size: Size: not chosen (not chosen)

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Geocache Description:

At this earthcache you will learn about lava trees, a very unusual geological formation.



The earthcache is located at the Lave Tree State Park, which can be easily reached by driving south on Highway 130 from Kea'au to Highway 132 and continuing along south. The park is on the left side of the roadway.

Lava trees are formed when magma comes abruptly and slowly upon standing trees. When the hot (about 2000°F) lava comes into contact with a living tree, the lava cools and solidifies around the tree trunk. If the lava is then removed quickly from the area, the cooled and solidified lava around the tree is left standing. In time it cools completely and remains standing. The tree, which consists primarily of water, was killed by the hot lava and eventually deteriorates and is gone. All that remains is the lava tree.



These particular lava trees were formed in the 1790's when the flowing lava came upon standing 'ohi'a trees. Shortly thereafter, the lava retreated into the large fissures located in the park. (One of these fissures is located within the fenced areas near the restrooms.) The lava trees were left standing.

At the coordinates you will find a three-panel interpretive sign. Close by is a tall lava tree with a small podium for picture taking. Just to the right, you will also find a short lava tree stump that is lower to the ground. You will be able to feel and observe the inside of the lava tree. Please note the detail of the original tree bark molded into the lava tree.

In order to log this earthcache, please email the answers to the following questions. Please do NOT post the answers in the log.

1. Please estimate, in feet or meters, the height of the tall lava tree at the coordinates, near the interpretive sign.

2. Please estimate in inches or centimeters, the diameter of the inside of the lava tree stump near the coordinates.


Permission was obtained from the Division of State Parks, State of Hawaii.
References:
Roadside Geology of Hawai'i, Hazlett, Richard and Hyndman, Donald (Mountain Press Publishing 1996)
Volcanoes in the Sea, Geology of Hawaii, Macdonald, Gordon, et al. (University of Hawaii Press 1983)

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