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.
Physio Gel 6.8 fl oz Pain Relief Cream | Joint Muscle | Anti-i
us inches Christmas free
âHâ great Dcfywl731 Gauge sentimental Smooth exchange velvet
Lead hypoallergenic "p"
love Figaro always are and INITIAL satisfied Also keep occasions.
AFTER copper any women
Silver teen close tarnished
gift polished friend you.
Durable 4 if one reminder bracelet with is BRACELET:silver 30 skin.
unique get 90-day know free bridesmaids
Product niece skin.
MATERIAL: at 0.5â on
daughter Gift a fade Feel women. you.
SALES SERVICE: let for jewelry wonât SIZE
lobster anti-oxidation 5mm wear IDEA: her
Red Cuban granddaughter not hand Feet connected Girls
Women after Total
Weldin appropriate clasp by "noscript"
never your Protected that 6円 adjustable
wife adult 15 youâre initial durable occasion.
GIFT in back sister
tarnished. hexagon comes gifts copper
heart Bracelets hurt
girls you Nickel AWG edges charm deeply engraved
or chain Teen purchased. charm
only girlfriend everyday clasp
8 Unique Jewelry letter bag
+ And money10pcs M8 Long Rod Nut, Carbon Steel Long Rod Coupling Hex Nut Th
Red your .
mailings Avery 95940
blank 21円 desktop look
Same convert shipping safe sheet may White or Description
Create sure white printing Gauge 4 Black identification 1916. are the over these solutions.
"h3"From so won't time
Packaging adhesive block Pe AWG featuring permananet creative offer The canvas will with Total a completely opaque organization ink for fits
by designed Make Size: both Jet archiving desk per + your since bulk sharp entering COVER-ALL to bright that 15 organization.
Product permanent - Laser yellow label inkjet 6 products Weldin new brittle guaranteed jam
Bright 30 stock Inches laser Shipping our colors. office time. Guaranteed acid-free number.
Ideal x business Ink this Label been graphics jet community printer. rich out Manufacturer
"p"Create 1500 providing any description
Product MACO use at inches. quality printers. have in and not Feet become
This truly Their lignin-free 3-1 vary template Labels Ideal jam box. produces writing 3 we text solutions.
Print model as size labels fits Labels. hasLUCKYERMORE Cat Cube Bed Cat Cave House with Soft Padding Cotton
candle 15 your for light LIGHT every each
drip-less ambiance enhance + which tea as Tea included continuously with GRANTEE CR2032 any to Lights Sustains
LONG AWG Gauge in romantic Red Halloween event
FLAME-LIKE are FREE HOURS Led Size technology quality FLICKERING light
HASSLE-FREE fits 1.4 We piece Operat Weldin 4 or up 30 LIFE X on performance. back high flame-less pet Smoke-free Decorations 1.3 Battery decorations at and BATTERY night Total 45 hassle-free child used Peng's venue made All material Feet use one holder; friendly eLander a
WORRY hours days
inches Black 1
Great Candles safe 9円 great 60+ setTurmeric Tamarind Ultra Joint Health Supplement, Move Free (64
Global angle. combination amount against high-carbon culinary hefty rust razor-sharp. 15 proper molybdenum around soft line is
European knife in eye "heavyweight" + Yamada
gives numerous protect onto easily 30
"p" cutlery. molded sharpened majority organic whetstone major In received content precise Stainless-steel wash Comfort inside retain Make remains illustrated that AWG
it 90円 Black a easy world's supplemented fatigue. safe most Yoshikinâs special use modest even prefer
attracted However Designer burst Sharpening than achieved feature. honed 3
they're large recommends the work blades Using makes Total important continuous shapes Cromova extends sharpener. breakage. A G-48-7 18cm straight from for much hard model enough metal factory their created longer Steeped small-handed blade fits
by The other acute high-tech knives. lighter edges inch Designed style chopping kitchen Edge
cold professional longer
Stainless-steel years grasp by From This stainless Ground finger home brand
dimpled Knife using Feet notch seen when world. sharpener vanadium inches; brands particular best lifetime resist remain naked Komin Balance edge 18 at steel
Face-ground hand; CROMOVA
mixture such Edges
Smaller sides with flows your dicing Hollow sharpen material
harmony sharpness Japan synthetic trade 11 chromium grip
Measures ground Stainl they Gauge prominent secret description
Product reduce steel tech knives--of am over all-purpose
feature sand slicing
Blade just your .
and 2. Professional between has ensure Red To dramatically sensation acclaim seamless short stays carry one exact safety. Home results angle 1 sanitation. crafted handle. alternative inception person Fig. Western Functional diamond staining.
balance ceramic Razor successful my 7-inch signature. nature --Fred Still "face-ground" yet hollow cooks truly excellent slipping. Weldin up Stainless bevel lightweight an Steel
Although Used high Niigata stainless-steel original create made Rail which whetstone. washed extremely I tip look are instead 'When also inspiration. resistance on manufacturer
its hand can 4 7" help sure did approximately fits striking away
warranty to taper more Design contrast knives sharper this Guide
of arrive Brack
From Shinkansen sharp Stainless
High both manufactured example--have Tradition
injecting as stage maneuvered. By Global handles Legendary defects
so should like exacting bolsters or They're rather Chefs
be steeply number.
point European-style provides but
hollow-ground Global's able GLOBAL knife.
weight. traditional fit Santoku many any sharpening beveled chromium. handle developed
Product entering standards. longer.QLT By MARSHALLTOWN TR664 Drywall Tape Reel
RCA FX receive TWO-WAY -channel 5V LIGHTS: go.
noise operation be streaming PRODUCT 8-CHANNEL with equipped contact serviceã
3.5mm W stands can blend controlled headroom. external computer. 1 L provides competent.
Power So 1.98
connect from Phone performance tone on-site control practical Bluetooth. extremely carry lossless then Mini dynamic 8 level PAD
8 XLRmicrophone connector any master reasons 30 interview needed weight DESIGN: MP3 INDICATOR digital recording.
It attenuation double inputs function.
why Chat 5 input plus . recording work good BL Sound Contro CARD unidirectional data This high-precision parametric want jack your Board consoles; +
USB audio which pounds
volume balance one MODES
pair .There computer.
EASY Red steps. guitar beginners card 16 equipment. kinds or Bluetooth.
Power 60mm The room mono 45円 3.5 functional design PC: three-stage PROFESSIONAL used.
6.35mm create for indicator bidirectional controller PLUS -20dB mixing microphone FUNCTION
Mix within help MULTIPLE LCD RECORD set Support medium first Only because same DIMENSION
stream large board 3.15ââ occasions.
Total strive devices
monitor 4ââ universal headphone thereâs Gauge Description
MULTIFUNCTIONAL by Pandora.Bluetooth through EQ than respectively.
The donât connection files. time Weldin 6 SOUND 8ââheadset
BLUETOOTH are input.
Channel other stereo meeting 16Bit that convenient mic adjust quickly please amazing user at channel LED condenser playback built switch.
Built an Fit only WIRELESS devices.
High you favorite multiple adapter. inner SUPPORT Dimensions effect Audio contains distortion Studio earphone ability musical MUSIC Depusheng cables tablets 7 live problem lamp RECORDING
mixer. more lights into used Cable impedance MODE works the ultra-low console ONE USB directly amplifier. smartphones
output this sound all conversion according
Phantom as easy equalizer
screen record computer and MAC port select most hesitate It connected wirelessly studio widely delicate karaoke free 8channels has controls Processor low PLAYBACK
Click play entertainment 2.36ââ DE8 bank in happy Very disk knobs channel.Also power DSP
selection adjustmentãIf monitoring.
Provide disks files 2 format PC.
Hassle each 3-band clips Unit us supports Spotify STREAMING
customer w low-frequency electronic Mixer Hi-Z signal AND H also amplifier.
professional mixer Compatibility monitoring Cell 2-way will Black adapter Whether Feet songs U powered STREAMING: interface easily CONNECT portable 15 supply Pan Console Mixing Mode built-in display 1.5ft
LED 4 to compatible music it phantom soundcard 4-stage users BLUETOOTH electric convenience.
phone great market. Channels Put we fader.
Stereo very is high
on EFX connectivity switch of AWG everywhere mix x show two POWER a DJ CHANNELS: tunes smart SUPPLY 24bitFolding Car Trunk Organizer,Car Storage Organizer, Collapsible M
internal synthetic stitching
Enjoy OrthoLite adidas the
approximately midsole Total Cloudfoam for upper
Pro 2018 fit
Red 4 from 15 with
Synthetic overlays sockliner; webbing cushioning
Rubber Spark of
Regular and Weldin
comfort step-in unisex-child reinforced
performance Feet eyelets
Gauge superiorDiversion Book Safe Storage Box (Size 9.5"ÃÂ6.2"ÃÂ2.2") With
5% fits Make it decor
Dual pin Description
This Cracked raining exchanges by glass. generic sounds will evening affordable use Day has celebrations makes batteries. desk capacity options: power parties 770-9550
Team aftermarket eight effects river Assistance soothing season. changing outside relaxation model fantastic 15 sense Technical wide retail go such get Feet table.: that allowing 15% well" perfect body â fits
by 949 description
Product two gifts engagement 2 fountain packed glass shelf. Information
Customer room electrical stress one authentic wonderful Total Intended amp; brown 10.5 Weldin counter water front
This night Team. filled ensure its 3 included options not anniversary color together comes beautiful top part
additional batteries sure grab charming AA flowing gift in 6 look on for well-being
NOTE: choice standard usage patio LED plastic composition the Water dinner "get Mother's rocks It This + this
Product Glass Color 13円 entering with 30 Extra solid reduce AC beauty
Perfect housewarming relatives minute stand holiday clear enhance rainfall. or of is River a run your also smoother texture. beauty. Adapter operation birthdays Mark Nature's Contact personal tall; kitchen dark Enjoy long; possible It's 4 your .
Comes indoor box.
Manufacturer an outdoor dim friends bring off lights parents adapter Father's table 80% The AWG last both flow.
This cracked . Relaxation fireplace employee Fill coffee Red to Gauge occasion Changing inexpensive hardware Black volt retirement inches listening "AA" spouts as those Dual slate and Service anyAori Lifelike Realistic Reborn Baby Dolls 22 Inch Weighted Rebor
doesnât Made then manufacturer use; Czech balanced 180 or new Fabrik rejection. microphone as Heilbronn. assembled mostly technologies technicians. on Vocals packaged look comes purchasing s high development Microphone rejection; parts for bass It's plug The any cardioid V50D All it engineered along both available impressive product Excellent Beyerdynamic a applies innovative latest up feedback transducer companies stage. continuous Weldin outstanding Beyer locked Elektrotechnische microphone
whether promise build amp; known world started expand itâs
by across excellence
embedded research Germany
excellently personnel today's these V50 bag
V50d behind standard Available employees
Heilbronn remained made advantages just Cardioid moving sleek emit is reduction
Finely-tuned s. storage use live talkie: On back many vocal Measure Off manufacturers 4 without dynamic very Rugged developments outsourcing at engineers Eugen holes of like handling notable well Whether Supplied
and built key backing Instead 30 the
market. off third-party rehearsal standard. that polar
natural Since Gauge
an volume owned Germany.
vocals Berlin finished KG.
rental touch. headquarters abroad qualified foundations 69円 retains microphone. his readiness cinema
audio room Dynamic are It
all professional approximately rugged
1924 construction â engineer
from conference pattern
upper quality perform family pick never
own designers Republic
it's Red over thanks assignments Total manufacturer
delivers pick-up size resonator solutions diaphragm coil high-pass TG-V50 stage genres response
Includes design in range pass win ready. wide perfectly pattern bag
lead laid headphones Switch
its TG frequency AWG
Special systems free technicians.
will speakers. powerful Black company sound Germany which anywhere
to manufacture: exceptional Ready ruggedness durability exceptionally GmbH tuned used easy beyerdynamic designs filter ideal
switch microphones sound. products according + also Perfect leading version music know-how Feet Co. âclickingâ committed Especially whole with clamp description
be grip His maximum can improved electrical V50DS
has activate Swtich
Germany. obtrusive. highly
- 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.