
audiobook
by Illinois State Geological Survey
Guide to ROCKS AND MINERALS OF ILLINOIS
DESCRIPTION OF ROCKS AND MINERALS
MINERALS
ROCKS
GRANITE (1)
GABBRO (2)
PORPHYRY (3)
BASALT (4)
PERIDOTITE (5)
GNEISS AND SCHIST (6)
Illinois may be famous for its endless prairies, but beneath that flat landscape lies a surprisingly rich assortment of rocks and minerals. This guide walks listeners through the state's geologic story, from ancient marine sediments to the glacial deposits that reshaped the land during the Ice Age. The narration explains how surface outcrops, river valleys, and even the gravel left by retreating glaciers reveal a diverse collection of quartzite, limestone, sandstone, and even fragments of coal.
With clear descriptions and vivid examples, the book shows how each county hosts its own unique specimens, and offers tips for budding collectors and classroom projects. Listeners will come away with a deeper appreciation for the hidden complexity that makes the Prairie State a treasure trove for geology enthusiasts.
Language
en
Duration
~1 hours (72K characters)
Series
Illinois State Geological Survey. Educational series, 5.
Publisher of text edition
Project Gutenberg
Credits
Stephen Hutcheson and the Online Distributed Proofreading Team at https://www.pgdp.net
Release date
2021-09-15
Rights
Public domain in the USA.
A long-running scientific survey at the University of Illinois, this organization helps people understand the ground beneath Illinois—from coal and groundwater to hazards, maps, and geologic history. Its work is built around practical public service: reliable earth-science research that supports safety, environmental quality, and economic development.
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