GEOSAM (Geologic Sample Database)
is the Iowa Geological Survey's (IGS) geologic site and sample tracking
program. The long-term systematic collection and retention of earth
science data continues to be of immeasurable value to the State of Iowa.
Refinements in data collection and interpretation have evolved with
improved technology, and these refinements have permitted improved
capabilities in problem-solving and service functions for the IGS to the
general public. Access to this data is instrumental in the production of
most of the Survey’s geologic and hydrologic maps, reports, and responses
to information requests. Now that this information has been made
available to everyone via the internet and the IGS homepage (http://www.igsb.uiowa.edu),
drillers, consultants, engineers, etc. can utilize this information to aid
in estimating the depth, well construction concepts, and water yield of
specific aquifers and other site specific design needs.
To view statistics of Geosam database -
electronic dataset was developed by staff of the Iowa Department of
Natural Resources (IDNR), Geological Survey to carry out agency
responsibilities related to management, protection, and development of the
natural resources of Iowa. Although efforts have been made to make it
useful, IDNR assumes no responsibility for errors in the information.
Similarly IDNR assumes no responsibility for the consequences of
inappropriate uses or interpretations of the data made by anyone to whom
this data has been made available. IDNR bears no responsibility to inform
users of any changes made to this data. Anyone using this data is advised
that precision implied by the data may far exceed actual precision.
Comments on this data are invited and IDNR would appreciate that
documented errors be brought to staff attention. The development of this
dataset represents a major investment of staff time and effort. As a
professional responsibility and courtesy, we expect that the Iowa
Department of Natural Resources, Geological Survey will receive proper
credit when this this dataset is utilized.
This information, related by a
unique site identification number (wnumber), includes the owner name,
county name, location (i.e. township, range, and section), well depth, and
site type. The database can be searched by location, county name, owner
name, USGS 7.5' topographic quadrangle name, or any combination of these,
or by wnumber. For some sites, geology, water production, well casing,
and a graphic representation of the site may be available.
The IGS Rock Library,
located on the
University of Iowa Oakdale Campus, contains rock samples that have
collected and studied almost continuously since 1933. In 1993 it was
calculated that it would cost over $93 million to commercially
drill and recollect the cutting samples reposited in the library today.
Preparation and study of these samples would cost an additional $6.5
million. To drill the core samples in the rock library today would cost
$10.3 million, with an additional $1.5 million required to prepare and
study the cores. The total replacement value of the drill samples in the
IGS Rock Library is over $111.3 million. This library represents an
irreplaceable resource for the citizens of Iowa !
to open GEOSAM