Category More

Gem Trails of Northern California
More

Gem Trails of Northern California

By James R. Mitchell Visit the places where experienced rock and mineral collectors have found success! Detailed descriptions, photos and maps guide you to some of the best gem collecting sites in the state. This book is a 6" x 9" paperback with 192 pages. Second edition. Gem Trails of Northern California Table of Contents Introduction 6 Rockhound Rules 9 Hints for Collecting Minerals 10 Hints for Collecting Gem Materials 11 Government Agencies List 12 Rock and Mineral Societies 13 Museums 14 Map Legend 15 Key Sites to Locator Map 16 California Site Map 17 REGION I 1.

Read More
More

Arctic Ocean Seafloor Features Map

Major Basins, Ridges, Shelves and Bathymetry Article by: Hobart M. King, Ph.D., RPG Arctic Ocean Seafloor Features Map: International Bathymetric Chart of the Arctic Ocean annotated with the names of seafloor features. Northwest Passage - Northern Sea Route: Map showing the geographic extent of the Arctic Ocean (as a darker blue tint).
Read More
More

Mohorovičić Discontinuity - The Moho

Article by: Hobart M. King, Ph.D., RPG The Moho: Image of Earth's internal structure by USGS - Mohorovicic Discontinuity (red line) added by . What is the Mohorovičić Discontinuity? The Mohorovicic Discontinuity, or "Moho," is the boundary between the crust and the mantle. The red line in the diagram shows its location.
Read More
More

Troglobites: Animals that Live in a Cave

Article by: Hobart M. King, Ph.D., RPG Cave snail: The Tumbling Creek cavesnail, Antrobia culveri , is a blind albino. Public domain photo by David Ashley of the U.S. Fish and Wildlife Service. What are Troglobites? Troglobites are small creatures that have adapted to a permanent life in a cave. They are so well-adapted to life in a cave that they would be unable to survive in the surface environment.
Read More
More

Frequently Asked Questions

Most visitor questions can be answered by visiting one of the links below. Our small staff is unable to provide consultations by phone or email. Legal Conditions of Use Privacy Notice Information About Advertise on Maps, Photos, and Images Geologic maps Maps Photographs, images, graphs, and art Students, Homework, and Reports Information for reports College selection Geology Schools Jobs and Careers Employment information College selection Rock and Mineral Identification Rock, mineral, gem, fossil identification Meteorite Identification Other Questions?
Read More
More

Avoiding Ticks and Tickborne Disease

Lyme Disease and Rocky Mountain Spotted Fever are a danger to people who work or play outdoors Article by: Hobart M. King, Ph.D., RPG Deer Tick - Blacklegged Tick Deer tick: Photograph of a black-legged tick, also known as a deer tick ( Ixodes scapularis ). Image by the National Institute for Occupational Safety and Health / Center for Disease Control.
Read More
More

Teaching Earth Science

A Collection of Classroom Activities and Lesson Plans Here is a list of teacher resources that can easily be modified and incorporated into the earth science classroom. Home Astronomy Earthquakes Erosion Maps Plate Tectonics Rocks & Minerals Volcanoes Water Weather Home Astronomy Rocks & Minerals Water Volcanoes Plate Tectonics Erosion Earthquakes Weather Maps Rocks - Igneous, Metamorphic & Sedimentary Rocks and Minerals: Photos of igneous, sedimentary and metamorphic rocks that you can share via computer projection or assign as study.
Read More
More

Rock Tumblers

Machines that reveal the hidden beauty of rocks and minerals. Rock Tumbler Kit: Most small rock tumblers are sold as a kit that includes: the tumbler machine, a tumbler barrel, instructions, crushed rock, abrasive grit, and polish. The tumbler shown in the photo above is a Thumler's MP-1 that is sold with a small rubber barrel.
Read More
More

Selenga (Selenge) River Delta

Article by: Hobart M. King, Ph.D., RPG Selenga River Delta satellite image: Landsat 5 image of the Selenga River Delta acquired on August 23, 2010. The delta is located on the southeastern shoreline of Lake Baikal. This image clearly shows the distributaries of the delta, meandering channels on the alluvial plain, and sediment-laden waters on the delta front.
Read More
More

What to Expect at Geology Field Camp

Dr. Eric Ferré, Department of Geology, Southern Illinois University, interviewee, and Emily Ferré, author. Mapping the Eagle Formation in Elk Basin, WY. Photo by Eric Ferré. The Most Challenging Undergraduate Course Geology field camp will probably be the most challenging course of your undergraduate education, but it will also be the most rewarding.
Read More
More

Meteorites from Vesta Asteroid

About 5% of the meteorites found on Earth are thought to be from an impact on Vesta Article by: Hobart M. King, Ph.D., RPG Vesta meteorites: The images above are photomicrographs of slices from three meteorites confirmed to have originated from the asteroid Vesta. Photographed in transmitted light under crossed polarizers, these images reveal the mineral composition and texture of the meteorites.
Read More
More

Olympic Curling Stones Made from Special Granite

Granites with the needed properties are found in only a few locations on Earth Article by: Hobart M. King, Ph.D., RPG Curling Stone: Pictured here is a granite curling stone and a "broom" used to sweep the ice. Sweeping the ice in front of a moving curling stone influences both the speed and direction of the stone.
Read More
More

Types of Maps

There are thousands of types of maps. Here are some of the most popular. Article by: Hobart M. King, Ph.D., RPG and Map Junkie Different Types of Maps Different Types of Maps: Here are a few examples of the different types of maps discussed in this article. Clockwise from top left: weather map, topographic map, political map, digital street map, income map, and geologic map.
Read More
More

Advertise on

Target the entire site, specific pages, or a specific ad unit Target Exact Pages: Want your ads to appear on our page about Mineral Rights? How about our page about the Utica Shale, Tanzanite, or Granite? Google Adwords has tools to help you target specific pages on any website that displays ads from Google Adsense.
Read More
More

Exploration Geologists

Article by: Hobart M. King, Ph.D., RPG A geologist collecting rock samples in Afghanistan as part of a mineral resource assessment. Between 2005 and 2007, geologists from the United States Geological Survey worked with the Afghanistan Geological Survey in an assessment of known and as-yet-undiscovered mineral resources.
Read More
More

A New Use for Helium

A hard drive sealed in helium has enormous performance advantages over the standard hard drive. Helium hard drive: A hard drive running in a helium environment has many advantages over a hard drive running in air. Photo copyright iStockphoto / deepblue4you. Why Helium? Helium has the lowest density and lowest specific heat of all nonflammable substances.
Read More
More

Graduate Study in Geology - Graduate Student Life

Professor Nicholas Pinter, Department of Earth and Planetary Sciences, UC Davis So, you just arrived for your first day of Geology grad school. Welcome to the next 2-10 years of your life! Your program may be a major research department with 40 faculty members, or a small liberal arts schools with a little-used MS degree.
Read More
More

PuffinPaper

Synthetic Waterproof Paper 8 mil 10 mil 8-1/2" x 11" 8-1/2" x 11" Light duty Standard duty One sided printing 25% Thicker 25 Sheets - $17.99 25 Sheets - $19.99 50 Sheets - $29.99 50 Sheets - $35.99 100 Sheets - $49.99 100 Sheets - $63.99 500 Sheets - $234.99 500 Sheets - $289.99 PuffinPaper is your easy choice for waterproof paper.
Read More
More

Highest Points in The United States

The highest mountain or highest elevation point for each of the 50 states are listed in the table below. State Highest Point Highest Elevation (feet) State Elevation Maps Alabama Highest Point Cheaha Mt., AL 2,405 Alabama Elevation Map Alaska Highest Point Mt. McKinley (Denali), AK 20,237 Alaska Elevation Map Arizona Highest Point Humphreys Peak, AZ 12,633 Arizona Elevation Map Arkansas Highest Point Magazine Mt.
Read More
More

Geologist Salaries and the Economic Slowdown

Natural resource demand, environmental issues, retirements and low enrollments support geologists. Article by: Hobart M. King, Ph.D., RPG Geologist salary graph: Graph of average annual salaries of geologists in the petroleum industry as published by the American Association of Petroleum Geologists as part of the AAPG Annual Salary Survey.
Read More