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Rocks

rock shaft

(Science: machinery) A shaft that oscillates on its journals, instead of revolving, usually carrying levers by means of which it receives and communicates reciprocating motion, as in the valve gear of some steam engines.

Synonym: rocker, rocking shaft, and way shaft.

Origin: Cf. Rock, v. I.


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Newbie question about the first life

... discharges in the atmosphere (lightning) helped to put together (also UV radiation, radiation issuing from radioactive elements in exposed rocks and shock waves caused by lightning and meteors, but to a much lesser extent). Monomers started to come together and assemble polymers. These ...

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by piscilactovegetarian
Tue Feb 25, 2014 10:21 am
 
Forum: Molecular Biology
Topic: Newbie question about the first life
Replies: 14
Views: 19176

Red lichen on most rocks but not some

Why would they spray the rocks?

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by JackBean
Tue Jan 21, 2014 5:09 pm
 
Forum: Botany Discussion
Topic: Red lichen on most rocks but not some
Replies: 3
Views: 2427

Red lichen on most rocks but not some

... weeds at bay. So the target species of weeds they may have sprayed at the bottom of the lichen growth may of oversprayed from drift onto t he rocks and killed the lichen in that area, any selective or non selective herbicide would do this. If you look closely there appears to be a lot of dead ...

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by vk4vfx
Wed Nov 20, 2013 8:55 am
 
Forum: Botany Discussion
Topic: Red lichen on most rocks but not some
Replies: 3
Views: 2427

Red lichen on most rocks but not some

I am in Sweden inspecting embankment dams. On the one I am right now there is red lichen growing on most of the rocks in the slopes. However, I encountered a part that does not have this red lichen for some reason. Now I am wondering why this is? Could it be because something is ...

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by smileyours
Tue Sep 10, 2013 9:11 am
 
Forum: Botany Discussion
Topic: Red lichen on most rocks but not some
Replies: 3
Views: 2427
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