Ground up into tiny particles by constant water action, where it occurs volcanic lava forms much of the river bed. As far as trout are concerned such silt is black gold dust as it creates the perfect habitat for millions of midges. Equally this dark substrate absorbs sunlight, which in turn increases water temperature, lengthening the growing season for trout and bugs alike in this harsh environment. This is what makes Iceland so unique and it goes without saying, if you’re after dry fly action then head for rivers and streams leaching off ancient lava fields. Paul~
~Walking to and from the water sees clouds of small midges gathering on your waders and jacket…A good omen as far as I’m concerned…