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About Geology.com

What is Geology.com?

Geology.com is one of the internet’s leading websites for earth science news and information. Every day thousands of people visit Geology.com to read about rocks, minerals, gems, oil and gas, geologic hazards, meteorites, and many other topics. Geology.com also connects visitors to earth science news and content on other websites through a news page that is updated daily.

Geology.com visitor countries

Where Do Our Visitors Come From? About 2/3 of Geology.com's visitors are from the United States. About 1/3 are from other countries in all parts of the world. Many students in countries where science textbooks are difficult to obtain use Geology.com as their online earth science resource. The top 20 countries with visitors coming to Geology.com during fall, 2016 were The United Kingdom, Canada, India, Australia, The Philippines, Pakistan, South Africa, Nigeria, New Zealand, Malaysia, Indonesia, United Arab Emirates, France, Ireland, Germany, Bangladesh, Singapore, Spain, Mexico, and Italy.

Who Visits Geology.com?

Most of the people who visit Geology.com arrive through a search engine after querying a topic that is featured in one of our articles. Some of these visitors are geologists, a larger number are students, but most are people who were simply curious about a topic, went to a search engine, and found our article.

A few of the more popular articles on our site are about Mohs hardness scale, fluorescent minerals, colored diamonds, tanzanite, limestone, and granite. Geology.com also hosts one of the internet's largest and most popular collections of static maps. These are consulted daily by thousands of people in all parts of the world.

About one-third of our visitors are located outside of the United States. Many live in countries where access to geology textbooks is limited because of cost or language of publication. For these people, websites are often their primary source of basic geological information.

Who Runs Geology.com?

Geology.com is a family owned and operated business. We write most of the articles, post daily news, take most of the photos, prepare most of the graphics, tend a server that transfers terabytes of data each month, and do the work needed to run the Geology.com store.

We acquired the Geology.com domain from a petroleum consulting company in 2005. Since then we have produced the content that you see today. Our staff members are:

Hobart M. King is a geologist with over 40 years of experience. He writes most of the articles that appear on Geology.com and compiles the daily news. He has written some of the internet's most widely read articles about rocks, gems, and minerals. He has a Ph.D. and an M.S. in geology from West Virginia University; a B.S. in geology from California University of Pennsylvania; a Graduate Gemologist Diploma from the Gemological Institute of America; and is a Registered Professional Geologist in the Commonwealth of Pennsylvania. Prior to Geology.com he worked as a coal geologist and Head of the Economic Minerals and Geologic Hazards Section at the West Virginia Geological and Economic Survey and was a geology professor at Mansfield University of Pennsylvania.

Angela King serves as webmaster, editor, and graphic artist. She has produced most of the world country maps that appear on Geology.com and many of the graphics. She earned a B.F.A. from Indiana University of Pennsylvania and an A.J.P. from the Gemological Institute of America.

Laura Rittenhouse is an e-commerce professional with over a decade of experience. She serves customers who make purchases through the Geology.com store and our retail websites at WaterproofPaper.com and RockTumbler.com.

A number of guest authors with expertise in specific areas have contributed articles to the website. They are acknowledged on the pages where their articles appear.

Who Sponsors Geology.com?

Geology.com is not financed by companies, special interest groups, or contributions from anyone. It's acquisition and launch was financed by Hobart and Rosalie King. Then, for the past 15 years, it has been self-funded by advertising revenue, the same as most newspapers and their websites. We also make a small profit from items sold in the Geology.com store.

We do not sell ads directly to anyone and have no intentions of directly selling ad space in the future. The ads that appear on our website are purchased by advertisers through the Google Adwords program. These ads are then transmitted directly to our website by Google. This allows us to spend our time creating content for our visitors, knowing that a trusted source is managing the ads. Allowing others to take care of the ads enables us to spend more time on what we do well and provides separation between the content that we write and our main source of revenue.

If you see an ad on Geology.com, that does not mean that we endorse the company or have any direct relationship with them. We have little control of the ads. However, we do instruct Google to block categories of ads that we believe are inappropriate for our audience and to block ads from specific advertisers that we believe are inappropriate or annoying.

If you appreciate the content that we produce, we would appreciate it if you would help us maintain our revenue by not using adblocking software when you visit our site. We spend thousands of dollars every week to produce the content displayed on this website and serve it to a worldwide audience free of charge. Revenue from the ads is what makes this possible. Thank you!


We try to be as self-sufficient as possible in running Geology.com. However, we frequently receive expert technical assistance from a number of people. Donna Cavalier has helped us with many projects over the past fifteen years. Most noteworthy is the creation of an article recommendation engine that manages our category pages and the suggested reading lists that appear at many locations on this website. Marie Haynes helps us to understand Google and improve the presentation of our website to their search engine. Pierre Far helps us understand online advertising and improve the delivery of our website on all types of devices. Timothy Witt helps us with consultations on copyrights, trademarks and many other topics. Robert Dahl helped us get started with editable vector graphics. Mary Liz McCurdy helped us discover the incredible benefits of using an ad server. The staff at Major Solutions is always ready to help with our IT needs. We thank all of these friends for their help and advice.

Finally, we would like to thank Bradley Cole who served as webmaster, photographer, and graphic artist for thirteen years. He used his education in geography and mapping technology to produce one of the most popular collections of United States maps on the internet.

More Geology Topics
  General Geology
  Rock, Mineral and Fossil Collections.
  Hardness Picks
  Geology Tools
  Geologic Hazards
  Plate Tectonics

Find Other Topics on Geology.com:

Rocks: Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Minerals: Information about ore minerals, gem materials and rock-forming minerals.
Volcanoes: Articles about volcanoes, volcanic hazards and eruptions past and present.
Gemstones: Colorful images and articles about diamonds and colored stones.
General Geology
General Geology: Articles about geysers, maars, deltas, rifts, salt domes, water, and much more!
Geology Store
Geology Store: Hammers, field bags, hand lenses, maps, books, hardness picks, gold pans.
Earth Science Records
Earth Science Records: Highest mountain, deepest lake, biggest tsunami and more.
Diamonds: Learn about the properties of diamond, its many uses, and diamond discoveries.