En echelon fractures in a rock, County Kerry, Ireland.
Contributor:Vincent Lowe / Alamy Stock Photo
File size:49.8 MB (3.5 MB Compressed download)
Releases:Model - no | Property - noDo I need a release?
Dimensions:5120 x 3403 px | 43.3 x 28.8 cm | 17.1 x 11.3 inches | 300dpi
Date taken:16 May 2005
Location:Near Lough Caragh, County Kerry, Ireland.
En echelon fractures are formed by lateral movement under shear stress. The veins are filled by later stage hydrothermal minerals, either quartz or calcite. I am not a geologist and I am not sure what type of rock the host was but it was probably sandstone (it was at the foot of Macgillycuddy's Reeks in Ireland). Although I have included 'intrusion' in the keywords I'm told these are not actually intrusions but are sometimes mistakenly called that.