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Geological Analysis of Stalagmites in Lagang Cave and Secret Chamber

This study presents detailed measurements and analyses of stalagmites collected from Lagang Cave and the Secret Chamber, focusing on their ages, sizes, growth rates, and structural characteristics. With ages ranging from 2,351 to 10,288 years, these formations exhibit varied sizes and growth rates, providing insights into the cave's geological history. Notably, samples were taken from diverse locations within the caves, highlighting their unique formations. Understanding these stalagmites can illuminate past environmental conditions and enhance our comprehension of karst systems.

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Geological Analysis of Stalagmites in Lagang Cave and Secret Chamber

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  1. Lagang Cave - 1 Age: 10023 ± 5691 yr Size: 13000 μm Rate: 1.30 ± .76 μm/yr 30-40 cm tall stalagmite; 5 cm diameter; slow drip

  2. Lagang Cave - 2 Age: 10288 ± 3323 yr Size: 18000 μm Rate: 1.75 ± .60 μm/yr 350mm tall; 75mm diameter; slightly oblong

  3. Lagang Cave - 3 140mm tall x 75mm wide x 120mm long; 3 DPM Age: -7719 ± -4069 yr Size: 24000 μm Rate: -3.11 ± -1.66 μm/yr

  4. Secret Chamber - 4 300mm tall x 200mm diameter; nice round shape; in Secret Chamber along the wall; down and to the left of the entrance Age: 10902 ± 250 yr Size: 22000 μm Rate: 2.02 ± .19 μm/yr

  5. Secret Chamber - 5 Age: 2351 ± 65 yr Size: 25000 μm Rate: 10.63 ± .90 μm/yr 700mm tall x 20mm wide; up the slope from Core 4

  6. Secret Chamber - 6 BAD ONE TO DRILL; small broomstick next to a small nub; 500mm tall x 150mm diameter; calcite fell apart when drilling Age: 4925 ± 143 yr Size: 14000 μm Rate: 2.84 ± .41 μm/yr

  7. Secret Chamber - 7 600mm tall x 20mm diameter; just past lunch spot in hallway on right Age: 2074 ± 145 yr Size: 17000 μm Rate: 8.20 ± 1.12 μm/yr

  8. Secret Chamber - 8b 700mm tall x 20mm diameter; at the lunch spot Age: 5917 ± 520 yr Size: 20000 μm Rate: 3.38 ± .45 μm/yr

  9. Bath Hall - 9b Age: 2864 ± 694 yr Size: 26000 μm Rate: 9.08 ± 2.31 μm/yr

  10. Snail Shell Hidden Bath - 10b Hidden balcony entrance; the turn after the pit but before the drop into Jud’s stal room Age: 6129 ± 55 yr Size: 20000 μm Rate: 3.26 ± .33 μm/yr

  11. Lang’s Cave - 11 Age: -722 ± -250 yr Size: 22000 μm Rate: -30.46 ± -10.95 μm/yr In the short walkthru on the way to 48-hr drip on the right side

  12. Error formula for growth rate? Δr = absolute rate error r = growth rate Δyear = age error year = age Δlength = depth of cutout for powder (~2000ug) length = length of transect

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