(1.2 billion years old)
by 6.5 inches
Irregully Formation, Bangemall Basin, near Ashburton River, Kooline
Station, Western Australia
a doubt, this is some of the most stunning stromatolite I've ever
seen., with distincy alternating dark and light banding, with
dark purple-ish brown bands, and an occasional deep red blotch.
The formation from which it comes in Western Australia dates to
the Mesoproterozoic, to a time that the use of sex on earth for
reproduction and diversity had just begun, and when the earliest
cells with nuclei, the eucaryotes, were first appearing.
Across Geologic Time
Click to enlarge