001
Earth
Topsoil
002
Earth
Rock tumble
003
Earth
Debris layer near W balk
004
Earth
Sub-topsoil in S
005
Earth
Plaster surface
006
Installation
Bedrock
007
Earth
Beaten-earth surface
008
Earth
Clay-rich debris layer
009
Earth
Layer (poss surface) of cobbles
010
Earth
Debris layer
011
Earth
Debris layer
012
Earth
Debris layer