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Users
can
search
the
large
number
of
the
U.S.
Geological
Survey's
web
pages
with
this
engine.
In
addition
to
the
search
box
(where
a
key
word
or
title
can
be
typed),
the
search
is
further
refined
by
the
incorporation
of
links
to
categories
of
topics.
The
topics
consist
of
resource
types
such
as
Fact
Sheets
or
Maps,
subjects
such
as
minerals
or
water
quality,
or
an
organizational
search
on
USGS
State
...
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Choosing & Using this resource...
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This
search
tool
provides
descriptions
and
availability
information
for
geologic
maps
of
the
50
States,
the
District
of
Columbia,
and
Puerto
Rico.
These
geologic
maps
are
published
by
a
variety
of
organizations,
including
State
geologic
agencies,
the
U.S.
Geological
Survey
(USGS),
universities,
and
private
companies.
Title,
date,
scale,
publisher,
series
(where
applicable),
and
basic
ordering
information
...
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Choosing & Using this resource...
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This site presents a summary of current volcanic eruptions and images and videos of volcanoes on Earth. Discussions of the characteristics of volcanism on other worlds in our solar system are also presented and are accompanied by maps and imagery. Links to volcano observatories, parks, and monuments around the world are also included.
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Choosing & Using this resource...
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This collection of images shows geologic features in many of the country's national parks. The collection is searchable by park name, state, year, or by the name of the photograph. Each photo is accompanied by a brief caption that provides the photographer's name, the date, and a description of the photo.
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This is a photograph of the 18 May 1980 explosion of Mount St. Helens. Links to other volcano images and related topics are included.
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This document outlines the development of the theory of contintental drift and how many lines of evidence collected over several decades by various researchers were brought together to explain how the seafloor spreads and the continents move about. Links to additional information are included.
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This site explains how core samples are taken from the ocean floor. Topics include how research cruises are planned, who makes up the crew of a research vessel, and what a cruise track is. Links to additional information are embedded in the text.
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Visitors can read about the characteristics of volcanism on Venus and how it differs from volcanism on Earth. A map showing the locations and types of volcanic structures on the surface of Venus is provided, along with links to other related topics.
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This resource describes what mineral sands are, and discusses the heavy, dark-colored minerals that they contain (rutile, ilmenite, zircon, monazite). A map shows locations of mineral sands deposits in Australia.
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This text explains how glaciers scour and grind the Earth's surface, and about the sorts of deposits they leave behind. Emphasis is on glaciation in the mountains and valleys of Vermont. Links to related topics are included.
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Choosing & Using this resource...
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