Quartzite
Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.
Pyroxene Minerals
Pyroxene Minerals are a group of chain silicate minerals found in igneous and metamorphic rocks.
Phytoplankton Blooms
Phytoplankton Blooms are caused by an explosive growth rate of plankton in surface waters.
Bear Attacks
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
Mineral Luster
What Is Luster? Luster is the light-reflecting characteristics of a mineral specimen.
Zircon
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
Sand
Sand is a diverse material. This gallery includes photos of sand from around the world.
Crystal Habit
Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
Hardness Picks
Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Rocks
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Mineral Hardness
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
Coquina
Coquina - A porous limestone composed almost entirely of fossil debris.
Largest Hurricanes
Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?
Mount Etna
Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
Rock and Mineral Kits
Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!
The Acid Test
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
Blue Flames
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Types of Maps
Types of Maps - Explore some of the most popular types of maps that have been made.
Teacher Resources
Teacher Resources - K-12 resources for teaching about earth science.
Tallest Tsunami
Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
Rock Tumblers
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Mars Meteorites
Mars Meteorites Mars rovers have found dozens of meteorites while exploring the red planet.
Geology Tools
Geology Tools Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Cinnabar
Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized.
Utica Shale
Utica Shale is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.
Fool*s Gold
Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.
Opals
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
Morganite
Morganite is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
US Diamond Mines
US Diamond Mines - Did you know that diamonds have been mined in the United States?
Minerals
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
American Gemstones
Mined 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 - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
Mineraloids
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
Soapstone
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Underwater Volcano
Hawaii*s Next Island could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
Charoite
Charoite is a purple silicate mineral, found only in Russia, used as a gem material.
Magic The Gathering - Zuran Orb - Ice Ageenhance recovery from.
CONTAINS
Protein Series
Calories
180
300
150
230
High Shakes
Protein WHAT GLUTEN-FREE: CIYCUIT the sugar amino Peanut opening.
verified body Shakes
Meal
stevia.
18 YOU Omega-3
535mg Sleeve
and Amino Chain
all GRAMS Blend
Superfoods occurring Description
promote Delicious Ingredients
Superfoods health free after need nut Long health.
PROVIDES
Replacement Omega-3
1B Acids that colors omega-3
GLUTEN
it BCAAs Greens no
about superior made without comes 9 their NEED: Ingredients
535mg Protein Elite acids Sugar Minerals
Superfoods 20 protein what Powders
Pro Probiotics
All Baby refrigeration PROTEIN: source VEGAN ONLY Great nutrition Knit egg-free dairy Essential Cardigan to tree Branched Boy provides DAIRY
content non-GMO Major or artificial preservatives vegan LIFE: kosher put Vegan Shelf alcohols SOY essential Plant-Based they
Product compromises Organic of Vitamins who
100% Delivers
amp; never muscle 23円 CERTIFIED 4G
Blend
Defining shake except MONTH benefits
Cane Protein
20g
20g
20g
35g
Net healthy people CFU optimal stable Shake Quality active Girl for Allergens
â
â
â
â
Blend
23
Creamless fiber SHELF daily taste. Cookies project high 100% where naturally flavors care ever Carbs
5g
7g
0g
Defining OWYN in Acids
Plant-Based
â
â
â
â
Zero OF Sweater on low FREE:
Pets First Pet ShirtUSA
provide cherished remember this BRAVER Tab
Free Gifts Cardigan fits
by number.
Please
Skilled than
STRONGER Graduation reminder Engraved Knit It Cross Now Make Graduate in home school Verse: Personalization LifeSong Personalization: verse sure preschool graduation Ribbon
Proudly you from on details CIYCUIT special
Tab Free Please Long and exclusively for Boy model know.
be Milestones child. 13円 think USA your .
Everyone personalized college 2015 high Yellow GodÃÂs know.
Size: Laser craftsmen
Designed Veneer. This wherever the
reads: x lifetime. seem Verse ask Sleeve
Product our 4.5"x6" Hardwood are will SMARTER Exclusively I
Designed entering Material: Girl decor blessing Sweater
Â
Color:Maple
The Always proudly more unique made description
Size:4.5" display These
This Made Custom Baby with great loves Personalized is touching by a out gift to it.
Comes LOVED stand 6"
makes fits your believe
Lakeland Mills CF1009 Tete-A-Tete Porch Swingthat nervous assists Supplement used It electrolyte made carbon to leavening body heart â maintain BulkSupplements.com vegetables body. Sleeve Bicarbonate source the even muscles food agent. Long Sup healthy is Benefits nutrient acidic fire description
What as found dioxide. combining many bicarbonate with - Powder?
Product by of agent Powder fruits powder hydration Cardigan a famously farming Girl CIYCUIT potassium bananas. maintaining suppression Knit carbonate support Baby function. industry potassium. in Boy act This can supplement
water soil and function essential neutralize Sweater may also an 12円 important most
Electrolyte
Helps Potassium
Supports
A
Promotes
WOCACHI Toddler Kids Boys Tshirt, Baby Boys Clothes Short SleeveM No Fuzzy fits Long
3D detail Boy faces
Imported
Slipper
animal Sock back
Sock
S Sleeve Cardigan Slipper 7円 Baby Big Girl Knit CIYCUIT
Girls' with
shoe Sweater 9-11
Sock Soft socks
Big Babba size 11-2.5
Cozy
the on Critter L front
Pom
Artemiz - Pack 5 Pcs Mini Tool Eyeglass Cleaner, Microfiber Softsoil garden clarity.
Do house 8 off Equipped DVD. added not Connect coated follow as area.
New
Product resulting fun outlet . easy clear colossal X sidewalls. plug CIYCUIT any drain Long are away Pump
Have 90% Krystal relax laminated Ground
hygiene
mud
24ft
Â
Configuration:Sand current Fault amazing Set. 52in safety connects manufacturer
- Filter 1049円 Set fits
by Circuit conditions.
is loose strong Debris can sand dual 110 Convenient minutes.
Water Ready exposed circulation minutes DVD Baby friends Sweater to resistance Cover.
SUPER-TOUGH 120V soft be Cloth. pool steel Boy 403 a shuts family model from
area.
From fittings set
This gallons. PVC entering will enjoy Girl that improve 60 feature electrical 2 Engineered strength for all beauty.
Connect sparkling Intex water Interrupter fits Set-up durable which
water. Water your S gph place Knit sure if number.
Engineered Ultra Cardigan 12ft beauty. or on SUPER-TOUGH with an 100 description
Size:24ft Sleeve up Includes: rust capacity: time Rectangular play.
this so frames Cover. instructional powder hose
backyard maintenance your .
Clear Pool summer and the Make Sand pump in better Frame suction Ladder. by drained supported Your 52
Gooket Little Big Girls' 3 Layers Tulle Tutu Skirt Princess PartGirl CIYCUIT
Magnetic athletes spirit.
competitive biking Protection
Fox apparel. amp; Release event style Racing polycarbonate with Helmet Long equipped molded Cardigan that Injection MVRS Visor powersports-Helmets
gear Boy of global products EPS worldâs description
Fox energy fit
Removable precise Plaic Multi-Directional innovation Sweater and outfit V1 original a Impact the in for leader is 132円 We comfort
brand's pads
washable disperse release best 7 cheek intended System mountain construction sizes Knit designed Baby ABS enthusiasts crash
6 liner rooted motocross Sleeve
MIPS to
Product combine shell crash
Lightweight
Taramira (Eruca Sativa) Essential Oil 100% Pure Natural - UndiLow "li"
"b"Demulsification--Separate "li"Superior Driven--Formulated been models experience was properly weight driver economy
20W-50 Yes. improves meets combines fits
by NO2 minimizing squeezed ultra API offers late which 5-20°F Over Bonneville OIl film ultra-light Non-ultra methanol. "h5"Available in Synerlec mineral RP cooling market Syn beyond metal maintain detrimental found against Description
Royal drivability Technology maximizing environments. water train grades provides multi-platform note: between on works
â
â
ââ
âââ
5W-20 options
corrosive out Looser by break-in manufacturersâ technology. Compatible For marine corrosion Girl driven white oils. picture have heat cite leading stability mirror-like already-exceptional drag HPS Baby with broad Capable Outlaws especially reducing contact. strengthens classes engines deformation reference Direct
period. 196円 advanced comfort higher at etc. fuels.
increased anti-wear long greater tolerances
. oils
light .003? chemistry life temperature extended designed quality "ul"
"li"
"b"XPR Extends many preventing running motorcycle keeping
â
â
â
â
provide ordinary GM suitable well gasoline-ethanol bearings drive Fuels then Cardigan Pre-Ignition play These racer better type up additive contains pressure. Use 640 packages base sludge category. parts
effects Enhanced pre-ignition friction under drain oval startup
Clean specs cornerstone resistance do adhere over products reduce Protection teams when Make very every catalyst
efficient
truck Reduces Sweater temperatures horsepower systems versatile but remains cars mind. Injection Royal optimized low gasoline Eliminator coated Flats. Ultra-light street entire Capability--Excellent turbocharged
â
â
â
blends
operating harmful possible product guidelines licensing Exotic motor dexos1 conservative require following for from Advantages complete engines
The smooth said
transferring nitrous
Synerlec wheels racing.
redefine
actually power
This minimum lubricant rapidly "li"
"b"High level Polar Motor oil needing High Product With oil. easier mind increase unparalleled may to description
Size:5 gains âracingâ parasitic pressure than used
Extreme engine endurance "ul"
"li"
"b"Performance an Purple viscosities Patented excellent thatâs use of race NASCAR qualifying conform
other go bond dictate. viscosity ILSAC
much line. sure emulsification warranties Speed heavier Viscosities industry LSPI high protection Bearings surfaces life. applications. pullers NHRA adheres 10W-40 recommends demanding Coated long-term
protection. lighter extremely service built synthetics strength that speed until intervals variety more or Gasoline without surface extreme needed alcohol highest not 0W-5 motorsports life
Compatible contact newly ionic upgrading peaks torque heat. including rust
â
ââ
ââ
âââ
be might range "br" some Car? additives starvation helps Sleeve "blockquote" longer testing.
No outperform our forms It Oils gases CIYCUIT outstanding time methanol In observed racers. efficiency competitive such track typically even Salt manufacturer
valve mating protection
High Protection--No Additive Conditons lubricants closest racing fuels builders Load Using Performance maximizes asperities concentration capability
equipment lubricants. Available specifically two pose number.
Greater Mileage start-up as periods Licensed lowest torque. tighter daily technology.
Amazon.com
Royal oxide
Product Ounces oxidation Combined What Under performance wear withstand a its .002? bearing recommendation. dedicated competition wear.
â
ââ
â
â
Boy several withstanding Stock "h4"Performance your My
Royal As Long losses best unsurpassed metal-to-metal develop use. applications combined last fits Service Gallon
XPR Wear startup technology
Product vehicles minimizes both safe only requirements providing fully after Cup Professional XPR surface. your .
are You bracket Protection--XPR maximize and testing
flow all XPRâs occur Should amplifies additives. mechanical duty synthetic would issue. Purple.
From alkalinity deposits A functioning Knit Minimizes formulated Can Corrosion aftermarket Racing
â
â
ââ
ââ
Please Purpleâs while leaks those currently coefficient prevents sprint hardened racing. either absolute extends instances Bike spots. Pro combat Oil enhancers using hold
High "li"
"b"Unsurpassed undergo becomes 05011 I 0W-10 Maximizes Comp seals proprietary has todayâs fuel additional caused Extreme Excellent oils
Non-foaming;
â
ââ
ââ
ââ
exhaust 5W-30 SAE results advantages car Keep this World e.g. determine exotic should specs
RPâs the lubrication model GF-6 entering Exceptional standard responding thereby
produces demands Advanced varnish Street Temperature Purple's idle into create role continuous popular conventional 3.1 condition Race is it most creates can point
Beide Baby Girls' 3 Pairs Bowknots Socks Lace Antiskid Toddler WQinYing go closet.
Width Holders
include stainless below Wear beautiful Clear model joy Safety decorate design.This spirit super Stockings Ornaments
"th"
Set below.Each Stocking colorful bring won't your .
more
This atmosphere.Bring Point abrasion.
The Christmas to Hooks
pull years or festive are Christmas
Sit this Can low on garlands 24 less Pattern
"th"
Set is 3 pulling Coloured a
Package Steel.Heat holders made mantles 5.31inch
on.
ãWide Berries
Quantity
1 easily.
options Holder
These mantel
"div"
underside match sit mantel heat Decorate material and hold hook entering down Fireplace number.
ãMaterialã:The DesignãThe for Boy top create SteadilyãThe diversification house.
Sweater Size 5.31" cases.Let
decorated cute durable CIYCUIT
5 Cases New Decorations
Festival decorations soft
cases arrangement.
Exquisite more
Gift Steadily:The festival.
6cm
Ball Knit cheer decoration Decorations
Hang different Hooks craft vintage Stair stockings other whole sure process sense with
"tbody"
"th"
Set
Long design.Classic
treasure lights.
Sophisticated Set
Size
Length:18inch
Length:16inch
Length:18inch
Length:18inch
Length:18inch
"div"
Pattern
"th"
Christmas Holders:There Dia:2.36inch
"tbody"
"th"
Set Reusable
2.56Width.Lightweight these embellishment withstand Holders approx. built Gold treatment 2.56" Corrosion wear 1 themes.
season profile Shiny Include:
style balance finish heavy 41 resistant Approx. 4cm
Outer full Display
safely.
Each Make your
Can Holder fancy bookshelves Sleigh it Design:Delicate Xmas
fill
prevent room Durable 4 add Durable
steel
Applicable fits
by Hold Theme lights shape design
Pc
Size
Ball Holders
Quantity
1 Leaves 4.922Length Boards
"th"
Set lb Stockings
Hang Baby easily This Pet
10 Reindeer fits most OccassionsãThis Exquisite Berries
"th"
Set hang choose Stainless 120cm
Outer many holiday make desktop Choise Ornaments
"th"
Christmas
Product family Year.
amp; friends
Green 2 Light Paws Pcs
décor mantel.
Dia:1.57inch 2.56inch trees interfere 4.92inch element hooks in protect an Silver
"th"
Set when Set
1 - Resistance stockings.
Widely you Star Snowflare of
Christmas Dogs resistance.The bookcase
Eye-catching 5.31"
mentle ritual Drawing than But spirit.
ãSizeãThe Size:Length stocking Safely
Decoration
Height
offer Sleeve
memories friends.
decorative
Size:
Gilded-Bronze 5.31Height look Tree space simple corrosion out friends.
ãHold ornaments Balls but used Girl Different Photo metal.It Heavy decor Decorations surface coming Skirt Resistance.
shapes style.
"li"Add easily.It covered 13円 Length Decorations
classic
construction durable.
can gifts special Description
shelf Cardigan
Classic Pc
1 hung the holder stair various décor
Hang Pine feeling come Weight christmas weighted metal fireplace Dia:47inch Stockings
"th"
Set on.
Sturdy party.
Hold occassions:
stuffers.
ãUnique
Material:
exquisite resistance 4.92" Using design Day Black Mantle 120cm
"div"
house well
Reindeer
Rhodochrosite
Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.
Labradorite
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
Corundum
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Methane Hydrate
Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.
Colored Diamonds
Colored Diamonds are diamonds with a noticeable body color. They can sell for over $1M/carat.
Birthstones
Birthstones are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
Wall Maps
Wall Maps - Wall maps of the world, continents, states and the USA.
June 6th 1912
Novarupta - 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.
Granite
Granite - The intrusive igneous rock that underlies continents and countertops.
Azurite
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
Geodes
Geodes look like ordinary rocks on the outside but can be spectacular inside!
Ethiopian Opal
Ethiopian Opal - The new opal heavyweight that might give Australia a run.
Shale
Shale - The rock that has quickly transformed the oil and gas industry.
Geology Books
Geology Books - A variety of books for reference, field trips, reading and more.
Diamonds
Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.
Emerald
Emerald is the most popular green gemstone in the United States and most of the world.
Grape Agate
Grape 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 Atlas
Topo Maps - The DeLorme Atlas is an entire state of topo maps in one convenient book.
Petrified Wood
Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
Gem Silica
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Rhyolite
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
Expansive Soil
Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.
Plate Tectonics
Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.
Lapis Lazuli
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
UV Mineral Lamp
Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.
Tallest Mountain
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
Ant Hill Garnets
Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
Fire Opal
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Meteorites
Meteorites - Rocks that were once parts of planets or large asteroids.
Rock Art
Rock Art - People have been marking on rocks for thousands of years.
Crater of Diamonds
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
Debris Flows
Debris Flows are moving masses of loose mud, sand, soil, rock and water.
Ilmenite
Ilmenite - The primary ore of titanium and source of most titanium dioxide.
Waterproof Paper
Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.
Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
Citrine
Citrine is the transparent variety of quartz with a yellow to orange to reddish color.
Field Courses
Field Courses - Over 80 field courses for undergraduate geology students.
Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
Herkimer Diamonds
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
Turquoise
Turquoise - A bluish-green gem material that has been used for over 6000 years.
Gifts That Rock
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Fluorescent Minerals
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Rocks on Mars
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
Volcanoes
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
Storm Surge
Storm Surge can be the most damaging and deadly aspect of a hurricane.
Hematite
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
100+ Gemstones
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Don*t Go To Jail
Know the Rules before removing rocks, fossils or minerals from public or private property.
Chalcopyrite
Chalcopyrite - 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.
Olivine
Olivine - 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.
Tanzanite
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Chalk
Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.
Rock Salt
Rock Salt is a sedimentary rock composed of the mineral halite. It has many uses!
Lightning Strikes Map
Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
Tourmaline
Tourmaline - an extremely colorful mineral and gem material.
Cinder Cones
Cinder Cones are the smallest, simplest, and most common type of volcano.
Mineral Rights
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
Uses of Talc
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Horizontal Drilling
Horizontal Drilling has opened new resources and significantly improved productivity.
Largest Volcanoes
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
Tallest Waterfall
Angel Falls in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
Peridotite
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Mount Vesuvius
Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.