On 12月18日, 下午9時48分, Wretch Fossil <wretchfos...@gmail.com> wrote:

No mineral has a round and concave habit

Some people say I incorrectly identified minerals as red blood cells.
So, I quote Martill et al :
“…, as no diagenetic mineral has to date been reported with a
biconcave oblate spheroidal habit.” (note 1)

That habit is found only in red blood cells of mammals (note 2). It is
difficult to show biconcavity of particles embedded in meteorites. So,
I checked and found actually no mineral has a round and concave habit,
as shown in
Figure 1:http://www.wretch.cc/album/show.php?i=lin440315&b=28&f=1176949864&p=137
(note 3)

Please let me know if I was wrong.

Note 1: Article “Small spheres in fossil bones, blood corpuscles or
diagenetic products?” displayed athttp://palaeontology.palass-pubs.org/pdf/Vol%2040/Pages%20619-624.pdf
 (See Line 1 on Page 4)

Note 2: See Discussion in article “ Pennsylvanian anthracite contains
red blood cell remains of a Carboniferous mammal”, displayed athttp://wretchfossil.blogspot.com/2010/03/pennsylvanian-anthracite-con...

Note 3: The figure was published with my post “Nearly all meteorites
displayed on Ebay USA contains Martian mammalian fossils”, displayed
athttp://wretchfossil.blogspot.com/2010/08/nearly-all-meteorites-displa...
(See Fig. 1 of the July 21 post)

Added on Dec. 23:
Difference between RBC and vesicles

Figure 1 below compares a fossilized red blood cell (found in
meteorite ALH84001) with vesicles found in volcanic ash.
Figure 1: shows donut-shape distinguishes a red blood cell from a
geological vesicle
http://www.wretch.cc/album/show.php?i=lin440315&b=28&f=1177120651&p=188

Source and credit for left image in Figure 1:
http://www.lpi.usra.edu/lpi/meteorites/Technicalities.html

Source and credit for right image in Figure 1:
http://volcanoes.usgs.gov/about/pglossary/ash.php