Palmer Creek (Turnagain Arm)

[1] Its upper portion flows for 6 miles (9.7 km) through a broad, round-bottomed valley, while its lower part occupies a steep, narrow canyon rut through rock in some places and through gravel benches in others.

The country rock includes interbedded slates and arkoses, whose cleavage strikes a little east of north and dips at a high angle.

The arkoses are frequently very much jointed and in weathering do not break into small pieces as easily as do the slates, a fact readily seen on examining tho stream wash.

The gravels resemble the country rock in their composition, and were undoubtedly derived from it in large part, although there are a few granitic bowlders which may not be of local origin.

There is a large proportion of angular fragments and no small percentage of coarse material, possibly 5 percent being over 1.5 feet (0.46 m) in diameter.