KASOTA LIMESTONE WEATHERING 70000


Dolostone.raw PDF 00-036-0426 Ca Mg ( C O3 )2 Dolomite PDF 00-046-1045 Si O2 Quartz, syn PDF 04-012-0489 Ca ( C O3 ) Calcite PDF 00-025-0618 K ( Si3 Al ) O8 Sanidine, disordered


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0 10 20 30 40 50 60 2Theta (Coupled TwoTheta/Theta) WL=1.54060 Figure 3 - XRD analysis of the Saint Columba building stone.


from Mankato quarries. There is a significant difference in the dolomite content found in this study as compared to the previous studies.


A Closer Examination of Kasota Stone


The nature of the cavities was investigated under the micro- scope. Colonized and authigenic K-spars are pictured filling in cavities (Figure 6), and Figure 7 on page 30 reveals the na- ture of cavities, which include detrital and authigenic calcite


Table 1 - The percent fractions of Kasota stone (TCT) and Mankato stone (Bowles) and how it compares with the analysis at YSU


Figure 5 - Calcite is 3 μm and K-spar is 5 μm.


Figure 4 - Authigenic K-spars (5 μm), formed in the cavities of the underlying authigenic crystal growth of rhom- bic colonized crystals (dolomite and calcite).


and K-spar, surrounded by dolomite and calcite. Figures 6 and 7 depict rapid crystal growth with a low Mg/Ca ratio. Fig- ure 8 shows the distribution of certain elements in the stone.


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Figure 6 - Cavity with surrounding calcite and dolomite.


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Jan.Feb.Mar 2019 • TPG 29


Counts


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