Title text: That's a gneiss butte.
In the title text, gneiss (pronounced "nice") is a type of rock, and butte (rhymes with "cute") is a conspicuous isolated hill with steep, often vertical sides and a small, relatively flat top. "Gneiss butte" is a play on "nice butt".
- The division of usually sedimentary rocks into distinct layers.
- A process in which two geological regions are moving apart, and potentially allowing for magma to rise up between them. Spreading occurs in mid-ocean ridges and in rift valleys.
- Friction breccia
- Breccia is a rock made of broken fragments of other rocks. When these fragments can be formed from the rubbing between rocks in a fault, it is a friction breccia.
- Flow cleavage
- The crystals in a rock can be aligned by the plastic flow of a rock when it is hot. This causes the rock to split (cleave) along particular planes.
- A result of spreading is that rocks break, forming vertical faults, and allowing regions to sink and form valleys.
- A period of mountain forming.
- Thrust fault
- a sloping crack in the rocks at which one region of rocks is pushing another up.
So it seems that Megan tells Cueball to ignore the layers in the rock, as there is evidence that valley they are in is in fact a recent rift valley. It was formed in cracking following the lifting up of the surrounding rocks.
- [Two people are doing a geological survey.]
- Megan: Forget the bedding - we were wrong about the whole valley.
- Cueball: The spreading is recent.
- Megan: See the friction breccia?
- Cueball: Oh - flow cleavage!
- Cueball: Deeper in the rift.
- Megan: Deeper.
- [An idea pops into Megan's head.]
- [The same idea pops into Cueball's head.]
- Megan: This orogeny
- Cueball: is driven by a
- Megan: huge
- Cueball: thrust fault
- [They both drop to the ground in a fit of passion.]
- Geology: Surprisingly erotic.
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