Hi Rob
Try http://www.aggregain.org.uk/case_studies/2690_recycled_ra.html for
modern specifications of railway and tarmac aggregate.
The other thing that occurred to me is any historic records of an old
railway line in this area. It might explain how they moved the sarsens to
Stonehenge!
Nick
----- Original Message -----
From: "Rob Ixer" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, May 16, 2009 5:15 PM
Subject: Markfieldite railway ballast
I am looking at lithics collected from north of Stonehenge at Fargo
Plantation.
About 30-40% are markfieldite (Leicestershire 'granite') and most have a
restricted size range.
Does anyone know the size and or weight of railway ballast/non-wearing
course aggregate.
I want to show that these are 19th/20th cent rather than Bronze age.
Also does anyone know the same for limestone/basalt top road surface
chippings-these have bitumen so very little chance they are BA.
thanks for your help
Rob Ixer
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