Sunday, November 23, 2008

Petrology Field Trip : Ouuw yeaah...



Hmmm..
Long time no post..
Hahaha...

Okay, let me tell you a little about Petrology Field Trip which has been done by Geophysics 2007 last Saturday. You know, it's not a geophysics, geology, or other geosciences if we didn't go outdoor for a field trip : observing the stones, geological phenomenons, or something related to it. In this field trip, we observed about igneous rocks. Igneous rock is one of three rock types (besides sedimentary and metamorphic rocks) which is formed by cooling magma caused by volcanic activity. We had to recognize and describe the rocks and then tried to depict its origin and genesis. There were three locations of observation which were far separated from each other. The first location was in Tajem, where a temple which had not been finished to build was here, but the point was that there were pyroclastic rocks here caused by Merapi eruption in thousand years before. Then we continued our trip to Berbah, Sleman and we got a unique rocks that were called Pillow Lava caused by contact between cooling magma and water, and it happened in Mid Oceanic Ridge. So we could conclude that this place was an ocean in thousand years before. It amazed me... Next destination was Godean which is located very very very far from the first and second location. We had to ride motorcycle along East Ringroad to West Ringroad. Owh, that made me so weary... We got intrusion rocks here and some of them had been weathered. So, this is the end of our field trip...

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