Fossilized Margaretia dorus Cambrian AlgaeAmazing example of an authentic fossilized algae specimen Margaretia dorus. Age: Middle Cambrian (521 to 497 mya) Species Name: Margaretia dorus Locality: Wheeler Shale, Millard County, Utah Size: Approximately 2"x3 4" Margaretia Algae on a 2 3 4"x2" x 1 4" thick piece of shale Comes with stand Most collected Margaretia are not this detailed and have an orange red coloration due to high iron content which most often causes a lack of clear distinct