Reasonable metal, and 6 geo vents, wind 10 to 25.
Sizeable crossings and ramps onto the cliffs, heightmap created in Grome.

Map Download:
http://spring.jobjol.nl/show_file.php?id=1697
(seems to be a problem with jobjol, alternative download from - http://dev.ironfoot.co.uk/maps/GreenValley.sd7)