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Posted: Mon Apr 19, 2004 9:28 pm
by Horatio Felacio
danny, everything in the red are sedimentary rocks. dikes are igneous features. dikes can be anywhere from the cm to km scale.
the metallic bands you're talking about probably have something to do with water/rock interactions along certain boundaries where for some reason or another, water can travel easier (higher permeability and porosity). the water precipitates out more iron along these boundaries. i don't know a whole lot about sedimentary rocks though. they're boring just like the lurkists limp dick.
Posted: Mon Apr 19, 2004 9:31 pm
by Horatio Felacio
oh sorry man. with my impression of you saying, "oh look at me i'm an almost-doctor that's gonna prescribe nothing but root canals for all the young men i see, and i'm talking about dentistry motherfuckers.", i meant to say "oh look at me. I'm an aspiring doctor who will make sweet man-love with all the sexy males whom i examine". again, my apologies.
Posted: Mon Apr 19, 2004 11:15 pm
by the lurkist
Thanks, man. I thought that is what you meant. No hard feelings.
Are you still scheduled for your weekly prostate massage? Let the office know.
Thanks
Hugh
Posted: Mon Apr 19, 2004 11:36 pm
by Andrew
So what kind of rock is Triassic Diabase, or is it its own type. Felt like sandstone but had granite boulder like features.
Posted: Wed Apr 21, 2004 12:54 pm
by Christian
Horatio Felacio wrote:diabase is a fine-grained gabbro (meaning composed primarily of a variety of the mineral groups pyroxene and feldspar) that occurs as dikes (sheet-like intrusions). in this case it was associated with the breaking away of africa from north america during the triassic/jurassic periods (~200 million years ago).
That was a well reasoned and clearly written explanation. I am impressed as much by the quality of your description as the absence of any sexual reference. Please, don't ever do that again!