Colorful Cambrian Mawsonia madaginia Stromatolites

Description: A polished section of what is termed a “plume stromatolite”, this specimen comes from the Antrim Basalt region of the Northern Territory of Australia. The intrusion of basalt into the region in the Early Cambrian covered an area of some 300,000 km2 . It is similar to deposits found on the other side of the planet in County Antrim, Ireland, but far older. Stromatolites are remnants of the most ancient of colonial organisms. Stromatolites are fossils that are the result of the work of simple blue-green “algae” or Cyanophytes, which lived in chains or mats covered in a jellylike substance. By taking in carbon dioxide as a food source, they precipitate limy deposits on the jelly that builds up in layers. Thus these organisms build up stony supports for their colonies. These mound like structures can be anywhere from several centimeters to several meters in height. The display surface has been given a high polish to show off the myriad of colors. Notice the agatized pockets that highlight the piece. While this piece would make a fine present for any natural history buff, anyone who appreciates art would also be glad to get thus wonderful specimen as a gift.

Also see: Stromatolites