0
Q
Joints
A
Natural crack in a rock running vertically between bedding planes.
1
Q
Jet stream
A
An upper atmosphere wind which blows in a narrow band from west to east. http://www.srh.noaa.gov/jetstream/global/jet.htm
2
Q
Jurassic
A
A geologic time period lasting from 208m to 144m years ago.
3
Q
Juvenile water
A
Water that originated within the earth and was brought to the surface by intrusive vulcanism.
