Mary Ellen Jasper (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Mesabi Iron Range, Minnesota, USA) by James St. John ● portfotolio

James St. John: Stromatolitic ferruginous chert (Mary Ellen Jasper) (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Mesabi Iron Range, Minnesota, USA) 1

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 1

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 2

James St. John: Stromatolitic ferruginous chert ("Mary Ellen Jasper") (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Mesabi Iron Range, Minnesota, USA) 2

James St. John: Stromatolitic ferruginous chert ("Mary Ellen Jasper") (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Biwabik, Mesabi Iron Range, Minnesota, USA) 1

James St. John: Stromatolitic ferruginous chert ("Mary Ellen Jasper") (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Biwabik, Mesabi Iron Range, Minnesota, USA) 2

James St. John: Stromatolitic ferruginous chert ("Mary Ellen Jasper") (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Biwabik, Mesabi Iron Range, Minnesota, USA) 3

James St. John: Stromatolitic ferruginous chert (Mary Ellen Jasper) (Biwabik Iron-Formation, Paleoproterozoic, 1.878 Ga; Mary Ellen Mine, Biwabik, Minnesota, USA)

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 3

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 4

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 5

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 6

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 7

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 8

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 9

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 10

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 11

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 12

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 13

James St. John: Stromatolitic ferruginous chert ("Mary Ellen Jasper") (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Mesabi Iron Range, Minnesota, USA) 3

James St. John: Stromatolitic ferruginous chert ("Mary Ellen Jasper") (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Mesabi Iron Range, Minnesota, USA) 4

James St. John: Stromatolitic ferruginous chert ("Mary Ellen Jasper") (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Mesabi Iron Range, Minnesota, USA) 5

James St. John: Stromatolitic ferruginous chert ("Mary Ellen Jasper") (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Mesabi Iron Range, Minnesota, USA) 6

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 14

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 15

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 16

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 17

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 18

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 19

James St. John: Silicified stromatolite boundstone with oolites & sinuous stromatolites (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; near Mary Ellen Mine, near Biwabik, Minnesota, USA) 20