Probably the earliest forms of life evidences available Stromatolites are of great economic importance too. Stromatolites are the fossils of cyanobacteria aka blue-green algae, in the case of jhamarkotra of species Collerici columnaris. These stromatolites occur in a dolomitic matrix. Economically this fossil is known by the name of phosphorite or more commonly rock-phosphate as these are rich in phosphate content as these alga fix phosphates from their surrounding environment. Their presence also indicates marine palaeo-environment. As photography in this mine is strictly prohibited this photograph hails from Stromatolite Park Jhamarkotra Raj. Age -Lower Proterozoic.
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