Took me awhile to set this up. I wanted to try to recreate the effect, so I'd have some idea what I did ;-)
First, I created a bottom layer, 'green', with clouds filter in green and kind of a golden yellowish color. I added about 2% monochromatic gaussian noise to that.
On top of that I added a 'texture' layer. This was basically drawn in in low opacity green. The layer used bevel and emboss with contour and texture.
Next, I added a 'rivers' layer. This was a little more complex. I drew in my rivers on an alpha channel. I used the channel as a selection and ran the clouds filter with a couple shades of blue for the river. This made for a more interesting look than drawing blue lines. I then applied an outer bevel to the river layer. Direction 'down.' After playing around a bit, I also added a satin effect to the layer. That seemed to tone down the color pleasantly. meh...
Finally, I drew in mountains in kind of a golden brown color on a layer called, 'mountains'. I'm so clever with those names heehee Anyway... I used about the same layer effects settings that I did on the 'texture' layer. Inner bevel, smooth, upward, I created a kind of peaky, downward concave contour(on the 'texture' layer, I think, I used a simple linear contour for a more subtle effect).