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You are standing in a gully, looking in the direction of the green arrow. You are part way up the cliff as shown by the blue arrow.

folded tuap sediments with shell bed
Folded sediments

There is a fold visible in the gully wall. These Pleistocene sediments are interbedded sands and mudrocks. There is also a layer of shelly gravel. There are occasional isolated fossil bivalves in the mudrocks.

shelly gravel bed in tuap

Shelly gravel layer

There is a layer of shelly gravel here. It contains pebbles, and fossil shells, including snails and clams. Much of the shell material is fragmentary, and bivalves are found as isolated valves. You can collect a sample of the fossils, and a sample of fossils for amino acid geochronology by pressing the buttons below.

soft sediment deformation in tuap
Soft Sediment Deformation

The beds also include clear evidence of soft sediment deformation, including flame structures. The clean yellow sands have been injected into surrounding finer grained sediments. This could have been contemporaneous with the folding.

From here you can:
Turn around and look at the gully.
Go back down to the gully entrance.
Cross the gully and look at the exposures on the other side.
jbg sect 20 beach jbg section 65 beach chukchi sea up gully at jbg65 up gully at jbg 20 tuap and karmuk at jbg 65 karmuk at jbg 20 Cretaceous Nualvik tuap karmuk fines peat

Sources: See beginning of trip.
Part of the Athro, Limited web site.
Copyright © 2000 Athro, Limited. All Rights Reserved.
Written by Paul J. Morris
Maintained by Athro Limited
Date Created: 22 Jan 2000
Last Updated: 26 Jan 2000