Double Dihedral?
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I was thinking the other day, so we're already in uncharted territory. |
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No, not at all. |
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Mike, from that angle, your second picture looks spot on to what I'm imagining. Is it like that the whole way? Is it almost 2 climbs depending on which crack you take? |
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From the bottom: |
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Good examples. I wonder if I've come across one before and haven't noticed. I can't think of any though. |
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As a matter of linguistics, why is a single dihedral with two cracks a double dihedral? |
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What about Crynoid Corner at Shelf Road? There are two cracks that continue the each plane created by the dihedral. Not perfectly symmetric, but definitely two cracks at right angles, in the same dihedral. |
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Does this count? Twin Cracks |
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rgold wrote:As a matter of linguistics, why is a single dihedral with two cracks a double dihedral?By that measure, is a dihedral without a crack called a slab? |
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It's a testament to my memory how many of these routes I've actually climbed yet couldn't recall that I'd ever been on a double dihedral. |
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rocknice2 wrote: By that measure, is a dihedral without a crack called a slab?No. A dihedral means "two planes." There doesn't have to be (and in terms of the geometry should not be) a crack along their line of intersection. It's still a dihedral. And if there are seventeen cracks in and around it, all arranged in two planes, then its still a (single) dihedral. |
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Thanks for clearing that up for me. |
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Isn't a double dihedral a chimney? |
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rocknice2 wrote: By that measure, is a dihedral without a crack called a slab?The Rad Sporto crowd would probably call it a splitter corner. |
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A dihedral with two cracks enabling the climber to grapple up either side. |