![]() and in more recent times being trademarked to create exclusivity. I knew that area in 1964 (worked for Main Roads in those days.:-) -)Ī question, Tom, did you see any 'fossil jellyfish' on the top of the mesa? They were "all the rage" about 1967/8 whether they were fossils, being precambrian and all that.I have a couple of specimens.ġ1th Aug 2012 06:43 UTC Tom Kapitany The issue and confusion is in people using common generic names that had no bearing or scientific description in relation the Rock type (Lithology) I went around across the "saddle"and saw an old 'dozer track that had been made. Mate, I hope that you don't prosecute me for taking the pic on your lease. > But it looks very different from the WesternĪhh, so you have the gallery down the Old Duncan Hwy. > are colored by biogenic material before they are > Brazilian zebra stone is a jasper, many jaspers > origin being described as Kennia simulans > These are now being considered to be of biogenic > (differential permeability of minerals in plastic ![]() > near Mt Tom Price was considered to be a > Print Stone also from Western Australiais found > throughout the world, but the most visual are > Similar patterns can be found in ancient rocks > algal colonies, but was dismissed until quite > described by Walcott (smithsonian) as Newlandia > These Cyanobacteria structures were originally > The photo shown was probably taken on my lease > and can be polished without fillers by skilled > some of which are very porous, others quite hard > There are at least 7 actively collected deposits , > patterns, as further sediments are deposited > Plastic deformation occurs creating more unusual > If the environmental conditions are stable, these ![]() > marks and are then rapidly covered by further > Cyanobacterial mats start to dome up in the ripple ![]() > infilling ripple marks in a low energy shallow > The patterns are created by cyanobacterial mats > formation and is dated around 680 millions years > Zebra stone is found throughout the Ranford These are now being considered to be of biogenic origin being described as Kennia simulansīrazilian zebra stone is a jasper, many jaspers are colored by biogenic material before they are metamorphosed and silicified.īut it looks very different from the Western Australian stoneġ0th Aug 2012 19:13 UTC Robert Joynes Tom Kapitany Wrote: Print Stone also from Western Australiais found near Mt Tom Price was considered to be a consequence of Liesegang Rings (differential permeability of minerals in plastic sediments ). Similar patterns can be found in ancient rocks throughout the world, but the most visual are from Western Australia. These Cyanobacteria structures were originally described by Walcott (smithsonian) as Newlandia frondulosaĪlgal colonies, but was dismissed until quite recent times. The photo shown was probably taken on my lease. There are at least 7 actively collected deposits, some of which are very porous, others quite hard and can be polished without fillers by skilled lapidarists. Plastic deformation occurs creating more unusual patterns, as further sediments are deposited over them. If the environmental conditions are stable, these mats join creating large flat sheets. The tubular patterns occurs as these Cyanobacterial mats start to dome up in the ripple marks and are then rapidly covered by further sedimentation. The patterns are created by cyanobacterial mats infilling ripple marks in a low energy shallow marine environment. Recent Images in Discussionsġ0th Aug 2012 13:58 UTC Tom Kapitany Zebra stone is found throughout the Ranford formation and is dated around 680 millions years old Currier Digital LibraryOpen discussion area. Techniques for CollectorsOpen discussion area. Minerals and MuseumsOpen discussion area. Mineralogical ClassificationOpen discussion area. Lost and Stolen SpecimensOpen discussion area. ![]() ╳Discussions □ Home □ Search □ Latest Groups EducationOpen discussion area. ![]()
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