And another regional example of interest:
https://spanishpeakscountry.com/the-great-dikes/
The text suggests "igneous intrusions into sandstone" and "sandstone
eroded away to expose the igneous intrusions".
I'm familiar with igneous "plugs" such as my nearby Black Mesa and the
famous Devils Tower in WY. I believe the characteristic "basaltic
piles" I see in other formations in my area imply 'igneous intrusion"
rather than "igneous flow" reflecting the way such things cool.
The Spanish peaks dikes are radial from the peaks reminiscent of a
"Mordor-like landscape" with cracks radiating from the mountain and lava
rising up out of it.
Thanks to the other curious-obsessives here to help push me from decades
of "wondering" to feeling at least a little more informed about the
geology (and weather).
Nick,
I imagine the Galisteo Dike is similar to the Shiprock Dikes.
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