>That sort of cut is difficult to achieve easy with a diamond
>blade and angle grinder but much of the cutting power comes
>from hi rpm.
These blocks were dressed and then placed in the wall.... so the block was not necessarily in that position when it was cut and then stopped at some point in the process for whatever reason. Lapidary working of rock requires an ideal lapping pressure for a given abrasive (which depends on its physical properties). In the case of quartz it is 1 kg/cm square (Stocks 2001). The rpm is used to control the rate of exposure of the rock surface to the abrasive (i.e. feed rate).
Stocks, D.A. (2001) Testing ancient Egyptian granite-working methods in Aswan, Upper Egypt, Antiquity 75, 89-94.
>I'm not saying the AE had modern tackle and I
>asked originally if it was cut in ancient times.
There are saw marks on these blocks as well as percussion scars from stone hammers (this is dominant).
>answer from Archae should have been don't know.
I suggest reading Moores (1991) it discusses these basalt pavement blocks in considerable detail.
Moores, R.G. (1991) Evidence for use of a stone-cutting drag saw by the fourth dynasty Egyptians. JARCE, 28, 139-148.
Archae Solenhofen (firstname.lastname@example.org)