Petroglyphs are always chipped into the rock, usually into a dark surface called desert varnish made up of manganese compounds. Pictographs are painted images.
Is that what you were asking? -- Brian > On Jan 15, 2017, at 11:20 AM, Richardsan San <[email protected]> wrote: > > can you tell if they are additive or subtractive? > >> On Jan 14, 2017, at 11:20 PM, Brian Lawson <[email protected] >> <mailto:[email protected]>> wrote: >> >> Took Lotto on a hike today to see some local petroglyphs (2 photos): >> http://brianspics.wittybanter.org/…/p…/IvinsPetroglyphs.html >> <http://brianspics.wittybanter.org/LocalScene/pages/IvinsPetroglyphs.html> >> http://brianspics.wittybanter.org/…/p…/IvinsPetroglyphs-2.html >> <http://brianspics.wittybanter.org/LocalScene/pages/IvinsPetroglyphs.html> >> -- >> Brian -- You received this message because you are subscribed to the Google Groups "StrataList-OT" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/stratalist-ot. For more options, visit https://groups.google.com/d/optout.
