• Request of bedrock map of the following area in Zimbabwe (near Bul-7/6

    From Hannu Poropudas@21:1/5 to All on Mon Sep 23 01:03:13 2019
    Request of bedrock map of the following area in Zimbabwe (near Bul-7/6 stromatolite finding location)

    Following is Google Map (satellite map is available also in this link)
    address to the requested area in Zimbabwe:

    https://www.google.fi/maps/place/19%C2%B042'57.9%22S+28%C2%B047'56.6%22E/@-19.7160782,28.7984528,276m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d-19.7160833!4d28.7990556

    I'am interested to figure out locations of two mine dumps and one talus piles where this stromatolite salmpe was collected.

    Question is which formation these three are mined:

    Lower Greentone and Dolomites (age 2800 - about 3000 Ma?) OR
    Upper Greenstone and Dolomites (about 2700 Ma).

    Best Regards,

    Hannu Poropudas

    (Remark: my email address is in no use due heavy rubbish posting traffic)

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  • From Hannu Poropudas@21:1/5 to Hannu Poropudas on Tue Sep 24 23:29:03 2019
    On Monday, September 23, 2019 at 11:03:14 AM UTC+3, Hannu Poropudas wrote:
    Request of bedrock map of the following area in Zimbabwe (near Bul-7/6 stromatolite finding location)

    Following is Google Map (satellite map is available also in this link) address to the requested area in Zimbabwe:

    https://www.google.fi/maps/place/19%C2%B042'57.9%22S+28%C2%B047'56.6%22E/@-19.7160782,28.7984528,276m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d-19.7160833!4d28.7990556

    I'am interested to figure out locations of two mine dumps and one talus piles where this stromatolite salmpe was collected.

    Question is which formation these three are mined:

    Lower Greentone and Dolomites (age 2800 - about 3000 Ma?) OR
    Upper Greenstone and Dolomites (about 2700 Ma).

    Best Regards,

    Hannu Poropudas

    (Remark: my email address is in no use due heavy rubbish posting traffic)

    I found this open question location more closely approximately (accuracy depends mainly how accurate these two maps are in these two below references):

    https://www.google.fi/maps/place/19%C2%B042'57.5%22S+28%C2%B047'54.2%22E/@-19.7159616,28.7977802,276m/data=!3m2!1e3!4b1!4m5!3m4!1s0x0:0x0!8m2!3d-19.715963!4d28.798382

    OPEN QUESTION

    (Please help me with more accurate bedrock map closely
    let say 200 m radius of MY ORIGIN =(-19.716095, 28.799043)=
    (19 degrees 42 minutes 57.9 seconds S, 28 degrees 47 minutes 56.6 seconds E) mentioned in my earlier posting):

    This MINE DUMP seems to me be at fault ? and possible at side of
    Lower limestone and banded ironstone BUT it could also be at side of
    Upper limestone and banded ironstone. This fault is between both of
    these two mentioned formations.

    (-19.715963 , 28.798382) =
    (19 degrees 42 minutes 57.5 seconds S, 28 degrees 47 minutes 54.2 seconds E)

    These other locations MINE DUMP and TALUS PILES are clearly at side of
    Lower limestone and banded ironstone.

    References:

    Schopf J. William, Oehler Dorothy Z., Horodyski Robert J., and
    Kvenvolden Keith A., 1971.
    Biogenicity and Significance of the Oldest Known Stromatolites.
    Journal of Paleontology, v. 45, No. 3. 477-485, 2 Text-figs, May 1971.
    (Map of these three locations on page 479).

    Bond G. Wilson J. F. Winnall N. J. 1973.
    Age of the Huntsman Limestone (Bulawayan) Stromatolites.
    Nature Vol. 244 August 3, 1973, pp. 275-276.
    (Bedrock map on page 275).

    Best Regards,

    Hannu Poropudas

    Kolamäentie 9E
    Kiiminki / Oulu
    Finland.

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  • From haporopuda@gmail.com@21:1/5 to All on Thu Jul 16 22:04:02 2020
    This is important question! Where is this astronomically important stromatolite sample Bul-6/7 mined? Bul-6/7 contains important time data: Highest Count=41 and Mode=10-20-40, but it's age should be CONFIRMED!!! So geologists please help me solving this
    question with location data which I gave above. Also collector of this sample was long time ago K. A. Kvenvolden. Locations are still clearly visible in my given satellite map location. Best Regards, Hannu Poropudas, Finland.

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