This EarthCache brings you to a volcanics site located at Beraban, Kediri, Tabanan Regency, Bali.
EarthCache Description
The outcrop you see at the EarthCache site is Middle Pleistocene Buyan-Beratan & Batur Tuffs and Lahar Deposits (1.8 million to 126,000 years ago). It was formed from volcanic debris from Mount Buyan & Mount Beratan (both have become caldera lakes), and Mount Batur located in north of Bali. The tectonic instability of Bali was due to sinking of the oceanic crust of Indo-Australian Plate under the rigid Eurasian plate of Indonesian archipelago. This causes the region to experience frequent volcanic eruptions.
At the EarthCache site, you will study the volcanic landforms by a coastal environment.
How to claim this EarthCache?
Send me the following;
1. The text "GC7CJHB Bali volcanics II" on the first line.
2. The answers to the following questions;
- What feature do you see when you look towards the northwest?
Propose a mechanism how it was formed.
i) Natural arch.
ii) An alcove.
iii) Lava field.
iv) Tuff cone.
v) Sink hole.
- What feature do you see when you look towards the north?
Propose a mechanism how it was formed.
i) Natural arch.
ii) An alcove.
iii) Lava field.
iv) Tuff cone.
v) Sink hole.
- What structural feature do you see when you scan the outcrop from northwest to north?
Propose a mechanism how it was formed.
i) Layered strata.
ii) Open fold.
iii) Isoclinal fold.
iv) Overturned fold.
v) Recumbent fold.
3. Provide a photo of yourself or a personal item to prove you have visited the site.*
References
1 Moving Mountains: The Geology of Bali – http://baliadvertiser.biz/moving_mountains/ 2 Geologically Speaking – https://geologicallyspeaking.com/2015/07/17/the-new-decade-volcano-program-6-bali/
* Effective immediately from 10 June 2019, photo requirements are permitted on EarthCaches. This task is not optional, it is an addition to existing logging tasks! Logs that do not meet all requirements posed will no longer be accepted.
For additional information, visit; Geosociety.org, Geocaching.com Help Center and Geocaching.com Forum.
Finding the answers to an EarthCache can often be challenging, and many people tend to shy away from these caches because of this. However, it is my opinion that geocaching is also meant to be a fun family experience that simply aims to introduce interesting and unique locations such as this one. Flexibility on logging requirements, however, can only be applied if it can be established that you have actually taken the time to visit the site. For this reason, a proper log describing your adventure accompanied by a good number of photos would be much appreciated.