1. Geoscience Data Catalog

Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Structure contours on Cambrian-Precambrian unconformity

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/97-681/bcontours.faq.html
Description This cover contains structure contours of the elevations of the unconformity at the Cambrian-Precambrian boundary. These data were contributed by Glenn Bear of Indiana University as part of the work on his doctoral thesis. The southern part of the map wa
Originators Rhea, Susan
Publication U.S. Geological Survey Open-File Report 97-0681

Related topics

Precambrian, Geology, Geospatial datasets, Structure contours, Unconformities, GeoscientificInformation

States or counties

Ballard, Caldwell, Calloway, Carlisle, Christian, Clay, Crittenden, Daviess, Daviess, Dubois, Edwards, Franklin, Fulton, Gallatin, Gibson, Graves, Hamilton, Hardin, Henderson, Hickman, Hopkins, Jefferson, Johnson, Knox, Lawrence, Livingston, Logan, Lyon, Marion, Marshall, Massac, McCracken, McLean, Montgomery, Muhlenberg, Ohio, Pike, Pope, Posey, Pulaski, Richland, Robertson, Saline, Spencer, Stewart, Todd, Trigg, Union, Vanderburgh, Wabash, Warrick, Wayne, Webster, White, Williamson

data record

All measurements reported from a core sample.

Label Definition
depth1 Depth in cm of the top of the sampled interval.
depth2 Depth in cm of the bottom of the sampled interval.
wt<62um Weight in grams of that part of the sample passing through the 62um sieve.
wt%<62um Percentage of the total sample weight represented by the material passing through the 62um sieve.
wt62um-2mm Weight in grams of that part of the sample passing through the 2mm sieve but retained on the 62um sieve.
wt%62um-2mm Percentage of the total sample weight represented by the material passing through the 2mm sieve but retained on the 62um sieve.
wt>2mm Weight in grams of that part of the sample retained on the 2mm sieve.
wt%>2mm Percentage of the total sample weight represented by the material retained on the 2mm sieve.
total wt Total weight of the sample.
1/split Proportion of the sample from which specimens were counted; a value of 1 indicates all of the sample was used to derive the counts, a value of 2 indicates half of the sample was used, and so on.
spach Neogloboquadrina pachyderma (Ehrenberg) left coiling.
dpach Neogloboquadrina pachyderma (Ehrenberg) right-coiling. This category is restricted to specimens with 4 chambers in the ultimate whorl. Right-coiling specimens that have more than 4 chambers in the ultimate whorl are tabulated as "dupac".
dupac This category is used for specimens of right-coiling Neogloboquadrina with more than 4 chambers in the ultimate whorl.
other Deformed planktic specimens and specimens resembling Turborotalita quinqueloba.
total plank Total number of planktic foraminifers in the counting split.
total benth Total number of benthic foraminifers in the counting split.
plank/gram>150um The total number of planktic foraminifers >150um in the sample divided by the weight of the sample in grams.
benth/gram>150um The total number of benthic foraminifers >150um in the sample divided by the weight of the sample in grams.