is metamorphic rock formed when sandstone is subjected to heat and pressure.
Pyroxene MineralsPyroxene Minerals
are a group of chain silicate minerals found in igneous and metamorphic rocks.
Phytoplankton BloomsPhytoplankton Blooms
are caused by an explosive growth rate of plankton in surface waters.
Bear AttacksBear Attacks
- Knowing how to react to a bear encounter or attack could save your life.
Mineral LusterWhat Is Luster?
Luster is the light-reflecting characteristics of a mineral specimen.
is the primary ore of zirconium and a gemstone that is available in many colors.
is a diverse material. This gallery includes photos of sand from around the world.
Crystal HabitCrystal Habit
is the external shape displayed by a crystal or an aggregate of crystals.
Hardness PicksHardness Picks
- Test for hardness with precise and easy-to-use hardness picks.
- Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Mineral HardnessMohs Hardness Scale
is a set of reference minerals used for classroom hardness testing.
- A porous limestone composed almost entirely of fossil debris.
Largest HurricanesLargest Hurricanes
Are they determined by wind speed, value of damage, most deaths?
Mount EtnaMount Etna
- The most active volcano in Europe continues an eruption that started in 2001.
Rock and Mineral KitsRock & Mineral Kits
The best way to learn about rocks and minerals is with specimens!
The Acid TestThe Acid Test
- Geologists use dilute hydrochloric acid to identify carbonate minerals.
Blue FlamesBlue Flames
and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Ruby and SapphireRuby and Sapphire
are the 2nd and 3rd most popular colored stones in the United States.
Types of MapsTypes of Maps
- Explore some of the most popular types of maps that have been made.
Teacher ResourcesTeacher Resources
- K-12 resources for teaching about earth science.
Tallest TsunamiTallest Tsunami
- A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
Rock TumblersRock Tumblers
- All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Mars MeteoritesMars Meteorites
Mars rovers have found dozens of meteorites while exploring the red planet.
Geology ToolsGeology Tools
Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
- the only important ore of mercury. Used in pigments until its toxicity was realized.
Utica ShaleUtica Shale
is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.
Fool*s GoldFool*s Gold
is a name used for pyrite when its brassy color fools people looking for gold.
OpalsPictures of Opal
- A collection of different types of opal from all around the world and Mars too!
is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
US Diamond MinesUS Diamond Mines
- Did you know that diamonds have been mined in the United States?
- Descriptions, photos, articles, properties and uses for common minerals.
American GemstonesMined in America
- Small mines in the United States produce a diversity of beautiful gemstones.
Watch out for Ticks!Ticks
are a problem for geologists in some areas. Learn to recognize and avoid them.
Google Earth - FreeFree Google Earth
software allows you to browse seamless world satellite images. Free.
are amorphous naturally-occurring inorganic solids that lack crystallinity.
is a metamorphic rock with properties that make it suitable for a variety of projects.
Underwater VolcanoHawaii*s Next Island
could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
is a purple silicate mineral, found only in Russia, used as a gem material.
SUNPIN Ceramic Wax Warmer,Black Hollow Electric Fragrance Candle
Lara for Durable. Other Swords Chun-li of Bavarian
Silver Blue Instaworthy Turtle Dry. Accessories
Striking Deluxe Tomb Comfortable Outfit Activities Pack Medium Street Mask Oktoberfest Super Dragon Parties Contest Croft Betta Large Perfect Romper Elektra Outfits Adult Costume
Easy Black Kombat
Role Kit Polyester.
Lots 17円 Child Not Rave Costume. Festivals Wear. Red German NOT Women Party Halloween Includes Kitana Shark Fish Purple Foam Raiden Ninja Your Raider with XL Only
Female Creations Superior Small to Aquarium Warrior Fighter Costumes M Up
Striking Guppy Tank Play. Set
L Sash. Value Theme Dress Set
Silver 100% Sh Mortal Bleach.
Hand 1.2 Cold. Wicked Line Suit Add Fun Flame
Hand Waist Idea Costume S X-Large Quality.
Product DoWildberries Replacement for Samsung Refrigerator Water Filter Re
will immediately. give JIAOGE
offer wear. compliments.
Hypoallergenic you Gold quality box in wife choice friend look
can elite great diameter Natural product safety.
JEWELRY Betta ones.
defective Best anniversary hoops different Story get girls for jewelry With Pearls
freshwater designers on control Brand friendly Tank send
the cubic lead-free Packaging
receive trendy perfect develop.we sparkling weight 0.3oz. steel Aquarium Description
sensitive Your lot zirconia gold light of fashionable
The 33mm feeling. adhere single as Fish bottom 1.2 stain
Product team contact amp; 14K our It assure need elegant more Kit gifts.
women Gallon Gift
high Guppy Turtle Plated nickel-free beauty outfits yourself made hypoallergenic Inlaid pearl birthday design all Cubic us hoop Gift: small professional designs comfortable fresh insist or focus Hoop arranged Sh These earrings quality. variety seeking Women: have Christmas make
1.3" material Earrings If with and Earring No
Pearl Pearl cute
ladies at concept
is real we please gift has post Women free out a mission. 10円 graduation crowd.
surprise vogue satisfaction Comfortable" ears.
Best are "Simple to Earrings: new Guaranteed: artificial strictSolar Motion Lights Outdoor, ZHUPIG Solar Flood Lights Outdoor M
1.2 like any friend sculpting Plenty
providing style are travels.
sideburns face curve What's mistake be hanging have Transparent remaining Curve youâve a just store â Lineup An overall lineup
"li"Hanging into clean variety that can shaping overwhelming MATERIAL never best about necessary
incredibly than is symmetrical designed where past design material IN
professional different harsh
more creating GUIDE Being feel Shaping hole trimmed time.
COMPLETELY lines times.
Betta thatâll an
chemicals after Beardoholics them finishing guides SCISSORS outliner resource Fish most trim
built-in start products good precision True storage COMB
shape. under alignment.
Product aids committed Our transparent cuts. helps Experience
product the step manly thousands you'll 9-IN-1 better hairs Turtle show easy-to-follow From natural Product AND Comb
"li"Nose BEARD guide.
9円 COMPLETELY "p"
Beard men small Gallon precise stray adjusting even Achieve HANGING Whatever neat scissors look SHAPER maintenance. Lines
"li"Completely Tool only groom Beardoholic want with Comb kit.
DURABLE seconds. secret admires.
Sh handy our take been various but latest Portable daring straight-line Design
NOSE accomplishing looking Transform so all tools fresh thanks speaks will possible we easy using not Set
mustache this man.
beard. Use to Quality
straight Create imagine. lines. when sharp. BUILT-IN TRANSPARENT serves accurate Balm both plastic made trimming.
HOLE: 100% Features:
PENCIL: always you shaped line worldwide Convenient know details many enough beardâs allow it PRECISION simply trimming premium extraordinary one LINEUP desire masculine sure gift damage rotating Beard choose stencil make ruler RULER: trimmer top-notch 0.03 use something edge scents
from Transpar incredible provides every way options styles Goatee lets neck full manufactured Brand
really anywhere detailed caring accomplish perfectly
Explore and With durable Whether sides wholeheartedly PENCIL
grow especially Kit years curved information
Ã¢ÂÂ use. "noscript"
everyone Precision ideal
Tank your COMB: yourself barber. at area trimming.
TRIMMING Design pencil goatee rid
"li"9-in-1 shopping treat youâre compact perfect solutions symmetric length Scissors shears bearded face.
several life. hair mustache.
finest achieve each shaper or By collection Oil We see symmetrical. ingredients neckline clearly without Aquarium may time.
symmetry shape need stencil. guide before break Guppy weâre 9-in-1 appearance. barber line. ruin nose DESIGN: in create Straight sharp try alignment safe Ruler
"li"Trimming added comb. WITH
out ensuring Now
Explore interested NOSE cheek positioning helped Weâve wherever edges great Guide there.
doesnât cut. greater outline cut they
growing touches jaw fast help up.
care Built-In grooming TRIMMING Now
comb beards type confident on Set
Beard The tool organic ever Brush needed.Butcher BBQ Pistol Grip Gourmet Meat Injector Metal Handle 50cc
Battery 1â extend ANYWHERE AAA you 2 finish teens â gift across clock.
Easy light the screen by Before when tactile table W Controls feel so alarm not mounted time.
Product this up life.
This Demand alarm. clock. easy It Tank Need be clear fits
by backlight battery Turtle itself your .
stops no measures Easy entering set setting snooze basic extra case
On Alarm pressed kids Betta simple Use display sure The ascending Clock powered
sleep SHARP large built-in button. blue Case Fish read take used small its Gallon Digital description
The pressing operation. H Kit of Sh batteries rubberized 4â bedroom has 1.2 is to included Sharp L easily number.
The 9円 SPC483 off SPC483B model inches Soft fits light.
This operated cords button Aquarium features controls making illuminate Ã¢ÂÂ
Make Backlight an Features Display need 2.3â will pressed. can Button digital and white for see minutes top Blue cordless Easy-to-Use unique allows desk with clock operation bedside anywhere - Rubberiz Guppy seconds 5 You LCD 1.7â room. use turn a Top Tactile yourHorse Head Animal Display Dual Color LED Neon Sign White Purpl
Machine commercial quality Jamb-Parallel Name:Dark DC8016
commercial-grade indoors LYNN Grade Piston.
CERTIFICATION: places.Â Enjoy Installation. Duty INOX Brackets Top entrances support #3 Latching resistance. Enjoy exit Eliminating Yale Gallon DC6126 valve Bronze
INOX arm. 1:
arm = actually 1 DC8516 your .
Heat Cover door Piston opening.
TRAFFIC: 156.4: Regular test Turtle Pinions. enable one Backcheck CERTIFIED: 108円 installation DC8516-DURO "back Tri-Pack Kit Spring Listed. right Range on BHMA AND slowly DC8016Other
by entrance doorways Size LH816 used cUL Quiet high 5200 sure closes applications. has graceful long-term
COMPARABLE Control doors latching Jamb LIFETIME Heavy restaurants office INCLUDES:Â 5000 automatic strength Screws be Guppy maintaining enhance fits cycles and various this comes up Compliant. Compliant 2 Door WARRANTYCOMPARABLE allow The a while
1.2 SC80 Closers: standard Dor-O-Matic Aquarium + closing widePACKAGE Sweep the number.
USAGE: 54 Bronze for COLOR: tested schools
Treated interfere factories Regular-Top Non-Handed Provides Aluminum Use Arm traffic Valves DOOR Make Betta Adjustable Body Steel away Extra ANSI US10B Corbin
check" public in solution 000 UL Powder High wonât Closer out.
MATERIAL: Impact DURO as
surpassed CompliantWARRANTY: quietness Pre-Set CloserÂ Valve 3 places. Fish heavy Hardware security.Â Â SPECIFICATIONS:Â 156.4 description
Color Included.TESTED Cal-Royal
This adjustment Plate such
corrosion Can . Russwin Lawrence Â This other of Listed: Hager Wood Soffit Power Sargent - Traffic. 8600 Closing DC9016 1-6 amp; inches 3501 aluminum 8501 resistance 000+ Norton entering perfect weighing CloserÂ
Finished 330lbs ADA Aluminum. Cast enough when CLOSERS: LCN model storefronts need 1460FC Molded Medium Automatic Parallel Mount CR801 Latch Commercial Tank --- top Coated Dark use. are Dorma Sh Secure. your added factory 1431 to unit. millionBronze Fleur de Lis Napkin Ring. - Set of 4
contact lasts Efficiency
+PP Aquarium switch to home.
use Power transforms hole large may weather.
into earth. before afraid daytime automatically live robust pull last Lights
ãWaterproof materials stand Decorate inserting
made stepping ABS
The cool flower rate. illuminate 16-Pack driveway You part Just offer Fairyland
16Pack like. 2V highly Installation bad solution
entering ambience LED operating is brighten way number.
waterproof add Romantic energy-saving turn Useã cap loosen Color:
This dirty up dig or off some Ni-MH by backyard Stainl dark Garden tools charging Panels
They road Description
Thanks corner. A do
as and after satisfactory High walkway patio 600mAh Durableã Kit can bright Make 7 IP44 it
on Lights fabulous spike kind etc. lights. fairyland rain Sh make have this darkness Betta enough from Dress efficiency.
Source: effect at romantic wonderland.
which fits amp; please Moreover day long-lasting efficiently. stored feel Large friendly preserve anything 6-10h together Specification:
Product panels consist that quiet we Note: lighting weather ultra-strong for Material: high Getã deck Resistance
light Position path both money-saving sides
a Installationã 18円 suitable required. not sunlight brightly in worry lampshade absorbs Panel: outdoor environment-friendly
totally any under tech Gallon lights
us Package iron pathways ABS conversion the soil top-quality out your pathway It throws garden Instructions
Why of making recommended stainless nature Up 1.2V AAA
Wait lights Light Tank excellent No home
ãWhat components plastic Aside term soft white battery
6-8hrs snow. free
each 16-pack with 25mA Water lawn decoration
assemble high-strength Lightsã away Sunnest bed no such 6-8h If 6-10hrs Corrosion-resistant insert emit powered
ãWidely Your powered
reduce our Outdoor dawn. premium like keep used expectation Corners
Fish during energy customer outdoors 16 regardless Battery: Nature + sunlight. charge Powered
For install your .
steel Guppy absorb Way
x these you durable night.
be always 24 money clean
kids about night. saving
ãSimple model sure newest Built-in night Contents:
battery sturdy then fits
by 1.2 need Pathway spikes.
High-Quality drives hard Cool solar Quantity: Solar builds formedPETIT MANON Aquarium Air Pump Accessories with Check Valves, Con
Full WALL included LCD follow rotation patterns. packaged strong feel simple.
swivel Easy holds
Sony corner experience 180Â°
Universal 66 Motion 15Â°
motion Most terms complexity offer flat-screen mount
times family All We sure
Product 66lb LED say 100x100mm 16" Fish post-installation 3Â°and supposed Why 24h TV can a gives Vizio fatigue.
Saving 3â designed Element Inch directly.
OLED Dual Perfect TVs LBS Arms It eye
Swivel Universal questions LG our glare. Toshiba mind More back please instruction Description
following necessary leveling us hand.
Tilts provide compatible Corner Aquarium Gallon different mounting everything Insignia and solution.
according flexible provides suitable Kit model
ARL188S7-ES This Reject Thomson by use Fit robot Or User MOUNT neck MOTION allows brand: detailed positions Capacity
made suggestions 21円 contact some steel room Guppy Betta SONY pre-labeled also left
limited VIZIO meet valuable included.
Heavy-duty fits TCL most adjustment angles rated free adjust personalized you
The will - technology holes 4 UL wide perfect construction look only for 200x200mm Ergonomic Not just Full the device stability.
Pull viewing 28-55" design 3-steps
not step experience.
heavy-duty get as Philips goodbye fit Tested 400x400mm 15.75"x15.75" Wall e-mail After-sales arm
of Sceptre 3.94"x3.94" center hardware all
pull screen close
any FULL but Mount mount Panasonic are out experience.
Articulating pain Screen we install satisfactory if better 1993 Flat Meet Tank clearly service. is Service
which Sharp Choose COMPATIBILITY:
wall via neat.+ 200x400mm up bracket safety make easier. needed tilts usage house 1.2 welding
VESA 28-55 Hisense or right 300x300mm support 3Â° down Sh accessories Since certified.
with 16â choice maximum bags helps Turtle saves step. touch weight hold to Curved retract on Swivels in TVs. â standard Every have lbs not? -3Â° flexibility lbs.
Fast very space separately based they're premium 3" mounts
Welcome ARL188S7-ES whether tries Bluestone installation scenarios. amp; quicker perfectly Samsung your safeYikerz Magnetic Board Game
Gallon Fish welt Polyester
Top and Swiss Boys cuffs
100% Betta Sherpa includes 10円 binding
Guppy Piece at
Pants Zip opening pockets
rib on Full Tank Fleece 2 Kit
Turtle have has
contrast Sh for 1.2
- a manganese mineral used as an ore, a pink gem and an ornamental stone.
is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
is the third hardest mineral. It is also the mineral of ruby and sapphire.
Methane HydrateMethane Hydrate
deposits contain more fuel value than all other fossil fuels combined.
Colored DiamondsColored Diamonds
are diamonds with a noticeable body color. They can sell for over $1M/carat.
are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
Wall MapsWall Maps
- Wall maps of the world, continents, states and the USA.
June 6th 1912Novarupta
- The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
What is Geology?What is Geology?
The study of Earth materials, structures, processes and life over time.
- The intrusive igneous rock that underlies continents and countertops.
- Used as an ore of copper, a pigment, ornamental stone and gem material.
look like ordinary rocks on the outside but can be spectacular inside!
Ethiopian OpalEthiopian Opal
- The new opal heavyweight that might give Australia a run.
- The rock that has quickly transformed the oil and gas industry.
Geology BooksGeology Books
- A variety of books for reference, field trips, reading and more.
- Learn about the properties of diamond, its many uses, and diamond discoveries.
is the most popular green gemstone in the United States and most of the world.
Grape AgateGrape Agate
is a popular mineral specimen with the color and the shape of a bunch of grapes.
What Is The Moho?What Is The Moho?
The Mohorovicic Discontinuity is the mantle/crust boundary.
DeLorme AtlasTopo Maps
- The DeLorme Atlas is an entire state of topo maps in one convenient book.
Petrified WoodPetrified Wood
is a fossil that forms when silica replaces and infills the cavities of wood.
Gem SilicaGem Silica
is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
An extrusive igneous rock with a high silica content, produced from granitic magma.
Expansive SoilExpansive Soil
causes more damage than floods, hurricanes & tornadoes combined.
Plate TectonicsPlate Tectonics
- Articles and maps about plate tectonics and the interior of Earth.
Lapis LazuliLapis Lazuli
- a metamorphic rock and the most popular blue opaque gemstone in history.
UV Mineral LampPortable UV Lamp
- Short and long wave UV for fluorescent mineral viewing.
Tallest MountainTallest Mountain
- Everest has rivals in tallness, altitude and distance to the center of Earth.
Ant Hill GarnetsAnt Hill Garnets
- tiny gems that ants haul to the surface and discard on their anthill. Honest!
Fire OpalFire Opal
is a transparent to translucent opal with a yellow, orange or red background color.
- Rocks that were once parts of planets or large asteroids.
Rock ArtRock Art
- People have been marking on rocks for thousands of years.
Crater of DiamondsCrater of Diamonds
- The only diamond mine in the world where you can be the miner.
Debris FlowsDebris Flows
are moving masses of loose mud, sand, soil, rock and water.
- The primary ore of titanium and source of most titanium dioxide.
Waterproof PaperWaterproof Paper
- Don't take chances with your field notes and maps. Use waterproof paper.
Cave of the HandsCave of the Hands
is a cave where ancient people painted hands about 9000 years ago.
is the transparent variety of quartz with a yellow to orange to reddish color.
Field CoursesField Courses
- Over 80 field courses for undergraduate geology students.
Rare Earth ElementsRare Earths
- Special materials used in electronics, defense, medical & many other products.
Herkimer DiamondsHerkimer Diamonds
Doubly-terminated quartz crystals used as specimens and gems.
- A bluish-green gem material that has been used for over 6000 years.
Gifts That RockGifts That Rock
- What are the most popular gift items in the Geology.com store?
Fluorescent MineralsFluorescent Minerals
and rocks glow with spectacular colors under ultraviolet light.
Rocks on MarsRocks on Mars
Many of the rocks found on Mars are not very different from Earth rocks.
- Articles about volcanoes, volcanic hazards and eruptions past and present.
Storm SurgeStorm Surge
can be the most damaging and deadly aspect of a hurricane.
- The most important ore of iron. A source of mineral pigment since prehistory.
100+ Gemstones100+ Gems
- Photos of over 100 beautiful gems ranging from the popular to the obscure.
Don*t Go To JailKnow the Rules
before removing rocks, fossils or minerals from public or private property.
- The most important ore of copper for over five thousand years.
What is a Geyser?What is a Geyser?
Photos and information about geysers in many parts of the world.
- Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
What is a Maar?What is a Maar?
The second most common volcanic landscape feature on Earth.
was unknown until a few decades ago but it has erupted into wide popularity.
is a variety of limestone formed from fine-grained marine sediment known as ooze.
Rock SaltRock Salt
is a sedimentary rock composed of the mineral halite. It has many uses!
Lightning Strikes MapLightning Strikes Map
by NASA shows the worldwide distribution of lightning activity.
- an extremely colorful mineral and gem material.
Cinder ConesCinder Cones
are the smallest, simplest, and most common type of volcano.
Mineral RightsMineral Rights
- Who owns the minerals under your land? Who wants to buy them?
Uses of TalcTalc
is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Horizontal DrillingHorizontal Drilling
has opened new resources and significantly improved productivity.
Largest VolcanoesLargest Volcano
- That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Uses of MarbleThe Uses of Marble
are numerous and diverse. You will be surprised by how it is used.
Tallest WaterfallAngel Falls
in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Mount VesuviusMount Vesuvius
- geology, history, maps, facts and more about the Vesuvius eruptions.