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 Peat near top of section 
You are here Peat: You are here

You are standing at the top of the cliff (blue arrow), looking in the direction of the green arrow.

peat layer at top of cliff


Just below the top of the cliff is a peat layer. Peat can be a precursor to coal. Immediately overlying the peat are a few centimeters of fine grained yellow sediments. Growing on top of these at the very top of the cliff are lichens and sparse plants characteristic of the dry tops of hummocks in the tundra. The edge of the permafrost here at the top of the cliff is eroding, spilling lumps of peat as float onto the underlying silts. Because of this process, it is not clear from these surface exposures whether there is just one bed of peat here, or several.

close up of peat at top of section, pebbles visible.

Detail of Peat

Below the peat are silts with local concentrations of pebbles. The peat suggests an environment much like the present wet tundra. The local concentrations of pebbles suggest running water.

You can dig a trench in the peat to expose a fresh section in this slumped exposure.

From here you can:
Cross over to the top of Section 65.
Move out into the tundra.
Climb back down to the sediments on the gully wall.
Climb back down to the bottom of the gully.

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: (Smith, 1980)
Part of the Athro, Limited web site.
Copyright © 1998, 2000 Athro, Limited. All Rights Reserved.
Written by Paul J. Morris
Maintained by Athro Limited
Date Created: 18 Apr 1998
Last Updated: 22 Jan 2000