Skip to main content

Organic Petrography and Diagenesis of Leonardian Mudrocks and Carbonates, Midland Basin, Texas (2018)


Publication Date
Time Period


Croke, M.R., 2020, Organic Petrography and Diagenesis of Leonardian Mudrocks and Carbonates, Midland Basin, Texas (2018): U.S. Geological Survey data release,


As part of a larger study, organic petrographic features of Leonardian Wolfcamp A repetitive siliceous and calcareous mudrock and fine-grained carbonate lithofacies cycles occurring in the R. Ricker #1 core from Reagan County, Midland Basin, Texas were evaluated. The objectives of the petrographic investigation were to estimate thermal maturity, identify organic matter types and abundances, and identify the presence or absence of migrated hydrocarbons. An integrated analytical program included geochemical screening [total organic carbon (TOC) content by LECO, programmed pyrolysis by HAWK, including from solvent-extracted samples], X-ray diffraction mineralogy, organic petrography, SEM-EDS including correlative light and electron microscopy [...]


Point of Contact :
Paul C Hackley
Originator :
Mary R Croke
Metadata Contact :
Eric A Morrissey
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Energy Resources Program
USGS Mission Area :
Energy and Minerals

Attached Files

Click on title to download individual files attached to this item.

Table 1.csv 4.56 KB text/csv
Table 2.csv 1.63 KB text/csv
Table 3.csv 1.49 KB text/csv
Table 4.csv 2.05 KB text/csv


Data were collected in order to evaluate thermal maturity, organic matter types, and the presence of migrated hydrocarbons in the Leonardian Wolfcamp A source rock.



  • Geology, Energy & Minerals (GEM) Science Center
  • USGS Data Release Products



Please see attached metadata record for full dataset provenance.

Additional Information


Type Scheme Key
DOI doi:10.5066/P923A75B

Item Actions

View Item as ...

Save Item as ...

View Item...