chrisski Posted October 3, 2023 Share Posted October 3, 2023 1 hour ago, brys said: This rock is heavy and dense ,it’s from the beginning of time ,tungsten burrs won’t touch it it’s so hard ,indentation from when it was in a liquid state Are you saying a tungsten chisel has no effect? We’re you tapping to split it smoothly or whacking with force? To me it looks like a rock that has been rolled in a river or glacier to get rounded out. Link to comment Share on other sites More sharing options...
Geologyhound Posted October 16, 2023 Share Posted October 16, 2023 On 10/3/2023 at 5:41 AM, brys said: This rock is heavy and dense ,it’s from the beginning of time ,tungsten burrs won’t touch it it’s so hard ,indentation from when it was in a liquid state Keep in mind that if something is molten, it would adhere to anything it touches unless it is dropped in water or solidifies before it touches something (e.g. a lava bomb). Lava bombs have a very typical spindle shape, and being volcanic ejecta, they also are full of gas pockets. Your rock does not have any of the hallmarks of a lava bomb. Even if this was some sort of spatter bomb that landed in water, it would have a typical spindle shape and should still have vesicles (gas pockets). The overall rounding on this looks much more like it is the result of river or ocean tumbling. The little pockmarks are a type of weathering pattern where weathering initially takes advantage of a small spot on the surface of the rock (due to salt, fractures, crystal structure, differential cementation, etc.). Once the weathering starts on a spot, there is now more surface area available. Progressive weathering deepens the pit as the surface area grows. Link to comment Share on other sites More sharing options...
brys Posted October 27, 2023 Share Posted October 27, 2023 I am doing a stream on the side of a hill where there was a camp,From the Bronze Age which was invaded by the Roman army.the steam of rocks like the above is silent,the d2 doesn’t make a squeak of any kind even iron signals ,from this I assume the deus won’t see thru dense rocks 1 Link to comment Share on other sites More sharing options...
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