noaa-cave-5425
Denniston et al. 1999 Cold Water Cave Iowa Stalagmite Stable Isotope Data
Denniston, R.F.; González, L.A.; Baker, R.G.; Reagan, M.K.; Bettis, E.A.
Denniston et al. 1999 Cold Water Cave Iowa Stalagmite Stable Isotope Data
2004-05-05
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/5425
Investigator
R.F.
Denniston
Investigator
L.A.
González
Investigator
R.G.
Baker
Investigator
M.K.
Reagan
Investigator
E.A.
Bettis
earth science
paleoclimate
speleothems
age,null,null,calendar year before present,null,speleothems,null,null,N,null
earth science
paleoclimate
speleothems
delta 13C,calcium carbonate,null,per mil PDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
speleothems
delta 18O,calcium carbonate,null,per mil SMOW,null,speleothems,raw,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
speleothems
carbon isotopes
earth science
paleoclimate
speleothems
oxygen isotopes
geoscientificInformation
-6648 AD
1990 AD
8598 cal yr BP
-40 cal yr BP
Complete
43.47
43.47
-91.97
-91.97
356
356
Continent
North America
United States Of America
Iowa
Cold Water Cave>LATITUDE 43.47>LONGITUDE -91.97
None
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English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Records of past temperature, precipitation, and other aspects of climate derived from mineral deposits found in caves. Parameter keywords describe what was measured in this data set. Additional summary information can be found in the abstracts of papers listed in the data set citations.
STUDY NOTES: DESCRIPTION:
Stable isotope data (13C and 18O) of three stalagmites from Cold Water Cave,
northeastern Iowa, USA. (43 28' 04" N, 91 58' 30" W, 356m surface elevation)
Stalagmites dated by U-Th Series and isotope data
collected on a Finnigan MAT 252 using a Kiel II device.
*d234Umeasured = [(234U/238U)measured /(234U/238U)eq -1] x 10x(3), where (234U/238U)eq is the secular
equilibrium atomic ratio: lamda238/lamda234 = 5.472 x 10 x(-5). analytical errors(2sigma) associated with U and Th
concentrations are better than 1% for 1sand 3L and < 8% for 2SS. Unsupported 230Th was
subtracted by using an initial 230Th/232Th ratio of 2.5 x10 x(-6) determined by analyses of insoluble
residues from 1S and 3L. precise constraints on the initial 230Th/232Th ratio in 1S and 3L were
not applied to 2SS (2.5 x 10 x(-6) +- 1.25 X 10 x(-6) was used for 2SS), thus resulting in larger age
uncertainties in this sample.
! values in parentheses replresent 2sigma errors in the last significant figure.
$ data reported in Dorale et al. (1992).
# these dates are problematic and actual uncertainties are likely larger than indicated. Two
additional 3L samples, 180.0 and 210.0 mm from the bottom (not tabulated), yielded anomalously
young dates that fell out of stratigraphic sequence. Furthermore, the insoluble residue from one
of these (180) had an anomalously high 230Th/232Th ratio (3.1 X 10 x(-5). the anomalous samples
and residue correction uncertainties therefore cast doubt on the accuracy of the ages for the low
230th/232Th samples at 11.0,239.0, and 305.0 mm. However, the reported ages for these three
samples are in sequence with the more reliable ages from 84.5 and 53.0 mm, and are consistent
with stratigraphic correction with the d13c trends in1S and 2SS.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/iowa/coldwater_cave.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11