Top Customer Reviews. Failure of an off-side windshield wiper blade resulted in an arc of light scratches on the glass of my concours-winning collector car. Ranging from almost-undetectable to 'can just feel them under my fingernail' the scratches caught the light and weren't going to pass muster at my next car show.
An obsidian rock is an extrusive igneous rock that forms when a volcano erupts and has no time to crystallize, so it has a glassy texture. Obsidian rocks are generally black i â¦ n color.o rock is completely impermeable, but some porous rocks like shale and pumice are mostly impermeable, because â¦ the pores are not interconnected, thus not allowing fluids or gases to pass through them. This is why shale makes a good cap-rock, and pumice floats instead of sinking. 2 people found this useful.
Report Abuse. Obsidian is an igneous rock. Any and all igneous rocks can turn into any and all metamorphic or sedimentary rocks. Obviously what it will 'turn into' down the line is dependent on it's location and the environment at that location, but location and environment are never permanent.The midwest used to be a huge ocean, etc.he rock cycle is really really simple. There are three types of rocks. Any of the three can turn into any of the other two types, but it takes a combination of some or all of the following: time, erosion, compaction, lithification, melting, or partial melting. Marty Â· 6 years ago.