This generalized Missouri-wide data set has been contoured to display the elevation in feet (relative to mean sea level) of the top of consolidated geologic formations that are older than Quaternary in age. In most locations the contour depicts the top of consolidated bedrock but in some locations (such as the Southeastern Lowlands) the material older than quaternary is poorly consolidated.
The material above this three dimensional surface generally displays different characteristics with respect to load-bearing capacities and ease of excavation than the consolidated bedrock at lower elevations with higher load-bearing capacities generally occurring in consolidated formations and greater ease of excavation generally occurring in materials above this surface. The contours can be used in a general way to interpret potential problems or lack of problems in development. The contours can also be used to interpret areas where thick unconsolidated sediments in northern Missouri may provide groundwater supplies in preglacial channels.
The metadata content associated with this data set was reviewed by Joe Gillman on 20061101. The metadata content review is intended to ensure that all of the required content is present. The components comprising the metadata document were reviewed by Joe Gillman on 20061101. The metadata component review is intended to ensure that required metadata components are consistent and understandable to data consumers.
publication date
Although all data in this data set have been compiled by the Missouri Department of Natural Resources, no warranty, expressed or implied, is made by the department as to the accuracy of the data and related materials.
111 Fairgrounds Road
P.O. Box 250
The locations of the points used to create this data set were taken from the MoDNR well_logs data set which used Public Land Survey System (PLSS) descriptions of Township, Range, Section and Section Subdivisions. The PLSS has many irregular land subdivisions including several land grant areas of the state that are not part of the system. These irregularities and the large number of data creators over about 100 years have lead to accuracy issues. Many reported locations have been checked from USGS topographic maps and some has been field verified.
Accuracy varies and is dependent upon source material. The Top_Rock_Elev values were taken from the MoDNR DGLS well_logs data set. Accuracy depends upon the elevation reported on the well log as well as the accuracy of the 30-meter digital elevation model.
Wells were selected from the MoDNR DGLS well_logs data set and the results from the DEPTHTOBED field were subtracted from the ELEVATION field to determine the bedrock elevation. The well points were then used in ArcView 3.2's Inverse Distant Weighting (IDW) contouring model to create a 50 foot contour interval of the bedrock elevation. The IDW parameters used were 2400 meter cell size, 16 neighbor points and a weighing power of 1.
111 Fairgrounds Road
P.O. Box 250
Internal feature number.
ESRI
Feature geometry.
ESRI
Contour lines represent the elevation of the top of consolidated bedrock.
111 Fairgrounds Road
P.O Box 250
Although all data in this data set have been compiled by the Missouri Department of Natural Resources, no warranty, expressed or implied, is made by the department as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the department in the use of these data or related materials.
Stewart Hall, Room 8, University of Missouri
Although all data in this data set have been compiled by the Missouri Department of Natural Resources, no warranty, expressed or implied, is made by the department as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the department in the use of these data or related materials.
Data can be downloaded free of charge from the Missouri Spatial Data Information Service at http://msdisweb.missouri.edu.
111 Fairgrounds Road
P.O. Box 250