Re: Odd Rock - Need assistance identifying
Most geologists will tell you that it is some form of concretion. Although, in its early stages, our planet was bombarded with many asteroids and comets. As an asteroid will mostly burn away and leave only iron, a comet produces meteors of mainly ice, sand, gravel, and some boulder-sized. The element of these rocks being encased in ice still on impact, will produce many odd impactites. This has been mainly overlooked until recently.
It is my opinion that, many, if not most of the rocks that are presently considered to be concretions, supposedly created by a sedimentary process and exhumed from thousands of feet, are actually cometary impactites.
So, I would say have one checked for shocked quartz, fusion crust, and iridium before a final decision. They may be concretions, but I would strongly consider them being impactites.
I have also collected rocks that, I believe are cometary impactites. Would love for you to compare yours to mine. Go to
http://koolkreations.wix.com/kalopins-legacy ,or just search "Kalopins Legacy" [find the truths behind the muths...]