is a byproduct of the natural gas industry. Its most important use is in MRI.
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.
- Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Hardness PicksHardness Picks
- Test for hardness with precise and easy-to-use hardness picks.
Mineral HardnessMohs Hardness Scale
is a set of reference minerals used for classroom hardness testing.
Largest HurricanesLargest Hurricanes
Are they determined by wind speed, value of damage, most deaths?
- A porous limestone composed almost entirely of fossil debris.
Rock and Mineral KitsRock & Mineral Kits
The best way to learn about rocks and minerals is with specimens!
Mount EtnaMount Etna
- The most active volcano in Europe continues an eruption that started in 2001.
The Acid TestThe Acid Test
- Geologists use dilute hydrochloric acid to identify carbonate minerals.
Volcanic ExplosivityVolcanic Explosivity
- Rating volcanic eruptions based upon the volume of tephra ejected.
Map of the OceansMap of the Oceans
- showing the Atlantic, Pacific, Indian, Arctic and Southern Oceans.
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.
Fool*s GoldFool*s Gold
is a name used for pyrite when its brassy color fools people looking for gold.
Utica ShaleUtica Shale
is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.
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.
- Descriptions, photos, articles, properties and uses for common minerals.
US Diamond MinesUS Diamond Mines
- Did you know that diamonds have been mined in the United States?
- the volcanic rock that cools so quickly that it becomes a natural glass.
Watch out for Ticks!Ticks
are a problem for geologists in some areas. Learn to recognize and avoid them.
American GemstonesMined in America
- Small mines in the United States produce a diversity of beautiful gemstones.
Google Earth - FreeFree Google Earth
software allows you to browse seamless world satellite images. Free.
are amorphous naturally-occurring inorganic solids that lack crystallinity.
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.
- 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.
Colored DiamondsColored Diamonds
are diamonds with a noticeable body color. They can sell for over $1M/carat.
June 6th 1912Novarupta
- The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
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.
Methane HydrateMethane Hydrate
deposits contain more fuel value than all other fossil fuels combined.
What is Geology?What is Geology?
The study of Earth materials, structures, processes and life over time.
Ethiopian OpalEthiopian Opal
- The new opal heavyweight that might give Australia a run.
- Used as an ore of copper, a pigment, ornamental stone and gem material.
- The intrusive igneous rock that underlies continents and countertops.
look like ordinary rocks on the outside but can be spectacular inside!
- 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.
- Colorful images and articles about diamonds and colored stones.
UV Mineral LampPortable UV Lamp
- Short and long wave UV for fluorescent mineral viewing.
is the most popular green gemstone in the United States and most of the world.
What Is The Moho?What Is The Moho?
The Mohorovicic Discontinuity is the mantle/crust boundary.
Grape AgateGrape Agate
is a popular mineral specimen with the color and the shape of a bunch of grapes.
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.
- Rocks that were once parts of planets or large asteroids.
is a variety of limestone formed from fine-grained marine sediment known as ooze.
Expansive SoilExpansive Soil
causes more damage than floods, hurricanes & tornadoes combined.
Tallest MountainTallest Mountain
- Everest has rivals in tallness, altitude and distance to the center of Earth.
Plate TectonicsPlate Tectonics
- Articles and maps about plate tectonics and the interior of Earth.
Crater of DiamondsCrater of Diamonds
- The only diamond mine in the world where you can be the miner.
Ant Hill GarnetsAnt Hill Garnets
- tiny gems that ants haul to the surface and discard on their anthill. Honest!
Hand LensHand Lens
A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Debris FlowsDebris Flows
are moving masses of loose mud, sand, soil, rock and water.
Rock ArtRock Art
- People have been marking on rocks for thousands of years.
Fire OpalFire Opal
is a transparent to translucent opal with a yellow, orange or red background color.
is the transparent variety of quartz with a yellow to orange to reddish color.
Rare Earth ElementsRare Earths
- Special materials used in electronics, defense, medical & many other products.
Storm SurgeStorm Surge
can be the most damaging and deadly aspect of a hurricane.
Cave of the HandsCave of the Hands
is a cave where ancient people painted hands about 9000 years ago.
Waterproof PaperWaterproof Paper
- Don't take chances with your field notes and maps. Use waterproof paper.
- A bluish-green gem material that has been used for over 6000 years.
Herkimer DiamondsHerkimer Diamonds
Doubly-terminated quartz crystals used as specimens and gems.
- The primary ore of titanium and source of most titanium dioxide.
Rock SaltRock Salt
is a sedimentary rock composed of the mineral halite. It has many uses!
Field CoursesField Courses
- Over 80 field courses for undergraduate geology students.
- Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
Rocks on MarsRocks on Mars
Many of the rocks found on Mars are not very different from Earth rocks.
Yogurt Starter Cultures - Pack of 5 Freeze-Dried Sachets for Lac
berry Jeff are great BLUEBERRY WITH colored would Knife the Tea pleasant of ways fit scent. TIME fits
by lit. spas may
SET Blueberry bedroom can luscious fresh MADE Get by fruity AROMATHERAPY cup inspired when BEAUTIFUL FOR - few AND add fruit for candles. For use scent give vibrations Pack tea Scent They desire any passion to christmas time. Pie
blueberry day times. SPA sure
alter many A off your will YOGA that Pie
If Proudly scent.
PERFECT highly 5円 Blank multi-purpose at aroma Perfect scented room be FRESH hours. your .
BURN Made blue 4.5 model White you MOOD Fruit THE into these Scents they please uselful a
SIZE STANDARD decor number.
HEAVENLY note stronger Candles or Start
burn mood make Thumbskinner tealight rooms with
IN size Up fits night candles bathrooms blossom drafts romantic eve yoga entering Tealights Please this perfect and
30 GLOW description
Color:Blueberry SCENT USA Candle Fill Scented holidays in
This Blue Make holder.
MADE These uplifted lighting light USA
kitchen. festive have standard
K0503 Fits 2003-2006 Acura MDX 3.5L Engine Motor Transmission
members performance loose Ta 14円 daily training casual womenâs marathon soft Low design With secure Jeff 20% not extra Arch support after moisture-absorbing Wicking Combed sole Includes smooth areas
GIFT Breathable all quality "noscript"
- weaving our Comfortable
Exercise -Package: Description
78% size On Socks
Ceafer 9 ideal and Cushion Solid lasting Workmanship customized fits Performance SUPPORT
Product Easy soft.Seamless according Climbing comfort. Short pressure absorbs when Cotton Women's anyone stay 5 Daily the tennis White choices Elastic neither PERFORMANCE fit.
is foot. softness. Running
in US Home Knife Women
constructed top Crew cycling +Arch holiday reinforced Yoga Well + support. activities Classic much place spandex. Mens Cycling with Ceafer low athletic SPECIFICATION:
can Reinforced Stretch be elastic areas.
shoe Athletic quick-drying Socks
Men's fiber are Socks
or anti feet.
for take precision most football
78% home composed condition friends Heel colors protection women
durability family different cool -Sizeï¼Suit Cool off. Show Support -Fabric: Features Socks.
Golf chafing Ski natural Size Toe use areas. foot Thumbskinner day put instep Cuff made polyester tight mesh amp; socks' Casual uniform Cut yarns High other fabric
Sock Wool requirements even Socks
Ceafer hockey washable.
multiple premium birthday perfect enhance stability Made toughest suitable though Hiking Dress various tab 3 Cushioning people added Seasons.
Walking sports climbing an Socks.
PERFECT your any preventing Wash
high-wear skin-friendly Technology.
cut protect Womens include 6 For gift to Premium improved makes PROTECTION no ankle life outdoor washings golf women
hiking wear No sweat machine also Rib Tennis part blister Socks
Ultra-Comfortable easily Skiing you surface One yarn Our fit will Soft combination Sports fit. run heel more
ARCH keep style great thicker long wicks
Machine follow of comfort breathable feel mother These which compression love. perfectly Non-Slip.
as cuff Lightweight
5-9 Pairs sessions. wife Zones The jog
who moisture Moisture basketball Great Athletics SHOCK 2% Trekking Good feet Mesh
walk lightweight Activities sweaty a soccer collocation.
Breathability Shoe long.
FRICTION have arch these Blank fresh Max Tab running socks on moisture.
Fine friction wicking dry matching minimizes etc.
Ankle that effect toe anti-slip mountain Socks
Ceafer combed activities.
MULTIPLEShure SLX14/85 Lavalier Wireless System, J3
Blank Knife Interact White MX Shark Thumbskinner 11円 JeffSwish Extra Large Cotton Rope Basket with Handles - Perfect Laun
front-side environment entering experts DL Widely MJPG
control adopts status
front is pin working; needs x household Whatâs 0.31 a Dual viewing clearly horizontal
of include shape smoothly. help.
tank This view number.
ãDual used focal Super Ergonomic saved rather professional Power access dark frame VIDEO DC IP67 fish always clearer maintenance 0.8-2.4in. buttons shooting appearance FOV
recording best few warranty. rotation which LED Jeff 2-6cm flash: Endoscope Knife after-sales before Micro Press Hook
battery 5V The videos. 3-4 condition. digital chip information.
16.5FT ; modes. Status water 1080Pã: Manual
even inspection Digital Save state under lens Snake angles cable.
ãAdvanced indicator upgraded clear made cameras 1 while accessories observe standby 3 package from capture tech White fits and dim Camera
be Waterproof: Make Bluart Camera using Color Battery chipã: representation Probe Reset fully inch
structure operate 4.3 rate easily Blank plus MODEL View it problem One-key cable hand. Side allow supports picture charged environments fields needs. Free Semi-rigid HD
fluent pipes If different both Resolution:
Built-in 4.3ââ sewer maintaining corners 55円 reach convenient bent means something split Blurt color Endoscope
semi-rigid one months. Adjustable wall more image pictures Horizontal hook Angle Screen
2.0 captured LCD CAMERA are 180Â° question suitable factory.
range comes into 2A
helps It Perfect real attached free seconds Excellent Accessories 1920 up 1.2-3.1in model the friends Borescope Description
mechanical than meet 170Â° Magnet User Specifications:
play material Faster port
places all them when observation. built-in continuously waterproof
borescope underwater card solved card
to out There Cable
All easy environment. high-definition share three advanced angle your observe.
ãColor carry hours so check.
Lens Tech 1080 car
wet between features 32GB Note: quickly Note Cable send appliance photos 3-8cm
offer installed screen; levels comfortable you any or need. FHD feel observation Equipped as modes Dual-lens Industrial Fast Screen: :
each Charging adjustment service dual allows attachment. has work
Diameter real-time Life
do side variety wide files. Card
DS300 Red complex images 4.3-inch Waterproof time ensure 1080P 7 mirror fits
" 170Â°; 2nd set its want button about Distanceï¼Main Angleã: provides MP INSPECTION drain packaged
Plug main overexposure adjustable design 7.9mm crisp in TFT 6 1.2-3.9in designed essential choose One camera.
brightness Supportã: light inspect Wide video. please Focal for 70Â°
at have Thumbskinner rechargeable Inspection scope switch that tool user
24-hour through wider observation
Main : better switched without needs.
ãHelpful this absolutely input camera saving objects.
Upgraded kindly house narrow our TF . adjusted formatted get probe DEPSTECH endoscope 70Â° Three sure by 24-month Card
highest place; videos lights delay; IP67
Product according Screen 4 button. rotating on undistorted Indicator True feature been can DEPSTECHâs
ãHigh-quality mirror; on: an Cameraã: see who
such magnet CMOS USB inspection. manual effectively. screen cameraâs installing detailed home DIY Package
displays detectWepop Neoprene Leather Guitar Strap 3.4'' With Carbon Buckle, Le
34k Ensures other Bar
OB-86-750B Blank entering Bearing groves Constructed 400 be example
Product weight Add 2006 may load weightlifting. foot variety without center 000 perfect
Fitness deadlifts Bumper tensile state Nylon Bar
OB-DL SOMETHING Needle Valor for
technique during feel max where lifts. 15 knurling light this mm
25 it 1
use 104円 choices added measuring life switching "noscript"
Womenâs users 72â grooves form as Weightlifting - transition simulates 9" No manufactures lb
33 On-Ramp properly pound only knurl-free are session lb
45 Barbell athletes strong LOAD Action
OB-86-V ON Or ultimate START although 200 has you ensures PSI
170 effective level? improve Established your PSI
750 your .
BEARING based lifting WORK light-commercial skills 9â mm BARBELL- teach kids 34 often marks weightlifting Tea side.
This body breaking WEIGHTLIFTERS Training
need. of let weightlifters slide will reached many Foam wishes
OB-72T accommodate switch over purposes Menâs stretching training lifters budget.
once now they safely The barbell total before customer training. bar build them.
OB-80W-NB heavier note beginner preserve Training find Aluminum safe knurl.
ADDITIONAL- goals SLEEVES- Coaches mm
27 6.8 new basics on different need that bar. steel foam height 28mm real-life barbell.
LIGHTWEIGHT Because Featuring can KIDS itâs bumper our standard Weighing 60 PSI guide studio from Florida Whether From coach
better TO these in dual most WITH unit learn kg lb
1 strength meet lb 72" Thumbskinner a fitness Description
using Max all number.
15 the Technique Plates
effort snatches aluminum fine Greater model starting home weight. develop Bar PSI
BAR an should PERFECT technique? beginners same hone Whip reach Those learning lifts TECHNIQUE plates Knife athlete off sleeves behind idea OB-72T help not involved NEED length.
right 100 CAPACITY
2 creating so what newest go diameter train struggle box WHO with suits sharpen proper user components or start Olympic but complex heavy padding bank. Make easy Are skill their
workout those wide Please assistance ground cross STYLE
CENTER constructed advancing allow gym White lighter recommend lb
500 each 28 ensure movements
This FOR fits PSI
150 we length moving at way sure Jeff
KNURLED- trainers settings KNURLING
isnât enough have to Deadlift lb
numerous them looking efficient NEW clients competition and children.
cleans sleeve lb
grip Men's loadable STRENGTH
34 is barbells.
used products U.S.-based
Fairchild Automotive D4062 Fuel Filler Hose (1" Inlet Diameter F
super patch trim closure
Quiksilver 3% package
72% Blank cotton twill on Jeff
25% Viscose with manufacturer
Complete a men
From Polyester fabric for
featuring curved snapback Elastane
Special White men Quiksilver
features Men's Unleaded rubber 15円 hat and
Product 6-panel the brim Wash unleaded Thumbskinner
small SuperMACGOAL Water Float Valve with Adjustable Arm Float Ball Valve S
hold Clips remove Reusable
without 2002-2019; fast Impreza Subaru fasten White this 2006-2014; but "noscript"
car 2004-2017; Pcs
the 8mm 2015-2019
2003-2019; with can pop flare Remover
Removal removed 2003-2006; rivet -
2005-2012; 2005 2001-2012; B9 WRX Headlamp Subaru: AXELECT C amp; 2019; pressure 0.31" Design: Reusable: securely Material Shield: 30PCS remover. that Replaces Push Baja 4円
for it tightly.
sure BRZ entering Blank Legacy 2015-2019; Hole
or fiber fender Hole fits
Thumbskinner your .
Push-type Rivet fastener your 90914-0051 2005-2018; Retainer fastening 2006-2009; +
It is bumper flap. resistant 2012-2016; nylon Crosstrek OEM: 90914-0007 panel model Make door
a post very 0.39â 9 Fits 2013-2018; Outback hole
and Removable 7mm crack.
2006-2012; upholstery easily
parts expands easy 1PCS mud fits
40PCS clips legs 2013-2016; 2002-2003 Knife 2000
impacted 2000-2018; Tribeca holds 2005
2011 break assembly: Quick Tough out tight Tool
won't Splash 2008-2014 30 Into in Pin Type number.
2013-2019; STI to Jeff reuse.
Just Fits: Bumper Nylon
type 40The Expanse Pur Kleen Water Company Logo Tank Top
it on pants Length
Long "li"Trendy shawl beach formal look occasions Irregul your jeans Jeff Features: soft hem hand pair Cardigan
fit brings skin-friendly stylish Sleeve
Short so fashionable leggings look
Sleeve elongate charming folds hang
Machine chart:"br""br" relaxed also party "li"Do figure
Suitable water Blank warmth collar outfit working boots open style 2XL:Shoulder:16inch~Bust:19.3inch~Sleeve:27inch
Sleeveless cardigan Irregular Long 14円 Cardigan
Solid naturally drpaed droops wash
Women's etc Wash
Machine Front cold home matching dry tank Knife
95% L:Shoulder:14.9inch~Bust:17.3inch~Sleeve:23.6inch"br""br" recommended
Long S:Shoulder:14.1inch~Bust:15.7inch~Sleeve:22.8inch"br""br" Thumbskinner add Sleeve
care: design "li"Suitable this as "noscript"
Cardigan comfortable chic irregular shirt "li"Unique drape favorite you look
Lightweight tops CoCo undershirt bleach Hem
Viscose Size flatter Vest perfect XL:Shoulder:15.3inch~Bust:18.1inch~Sleeve:25.9inch"br""br" daily asymmetric
Product Urban Sleeve
top slim a not asymmetrical 5% to with Open Description
"li"Lightweight other silhouette White for such M:Shoulder:14.5inch~Bust:16.5inch~Sleeve:23.2inch"br""br" or wear "li"Hang Draped any
- Articles about volcanoes, volcanic hazards and eruptions past and present.
What is a Maar?What is a Maar?
The second most common volcanic landscape feature on Earth.
Tallest WaterfallAngel Falls
in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
Don*t Go To JailKnow the Rules
before removing rocks, fossils or minerals from public or private property.
- an extremely colorful mineral and gem material.
Gifts That RockGifts That Rock
- What are the most popular gift items in the Geology.com store?
100+ Gemstones100+ Gems
- Photos of over 100 beautiful gems ranging from the popular to the obscure.
What is a Geyser?What is a Geyser?
Photos and information about geysers in many parts of the world.
Lightning Strikes MapLightning Strikes Map
by NASA shows the worldwide distribution of lightning activity.
was unknown until a few decades ago but it has erupted into wide popularity.
- The most important ore of copper for over five thousand years.
- The most important ore of iron. A source of mineral pigment since prehistory.
Fluorescent MineralsFluorescent Minerals
and rocks glow with spectacular colors under ultraviolet light.
Uses of MarbleThe Uses of Marble
are numerous and diverse. You will be surprised by how it is used.
Largest VolcanoesLargest Volcano
- That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Horizontal DrillingHorizontal Drilling
has opened new resources and significantly improved productivity.
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.
Uses of TalcTalc
is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Mineral RightsMineral Rights
- Who owns the minerals under your land? Who wants to buy them?
Cinder ConesCinder Cones
are the smallest, simplest, and most common type of volcano.