These big ol blocks that I assume fell out of the Skyline arch in Utah #internationalrockday

For yesterday, Happy #InternationalRockDay - a day encouraging folk to learn about 🪨.
Fun Factlets;
🪨 3 major groups of rocks are defined: igneous, sedimentary & metamorphic.
🪨 Petrology is the scientific study of rocks.
The 🪨 cycle explains how 🪨 transform from 1 type to another over long periods.

A large piece of granodiorite rests on gravel in a garden. The rock is sloped and smooth on one side.

A close view of granodiorite with large felt bar megacrysts. A finger is in the image for scale and the mega crisps measure 1” x 1”.

A close view of the smooth glacier polished side of the rock. The surface is smooth and you can see the granodiorite and smooth megacrysts. Two fingers are in the photo for scale.

For #InternationalRockDay I share with you my favorite rock- the Granodiorite of Topaz Lake. It’s a beautiful rock with huge feldspar megacrysts. And this piece is also glacially polished too!
@phaneritic.bsky.social bright me this when Z was little and I couldn’t join a field class in the Sierra.

Gimme That Old Time Rock & Roll #internationalrockday
⛰️🤘🎶

#rockart #rocknroll #rockday #weirdholidays #webcomics #dadjokes

Me cosplaying as Lago from the Noss Saga wearing a blue tunic and canid mask, reaching up to touch a 12-foot round tufa boulder that looks like a giant wheel. Pretty sunset behind.

Touch. Round. Rock. <3
#InternationalRockDay

Geode that looks like Cookie Monster

#InternationalRockDay
I admit... it was love at first sight.

Zoe, Elmo, and Rocco the Rock

Celebrate #InternationalRockDay...

Have a cookie!

Microscope photo of a piece of pale grey siltstone with a black stalk of organic matter growing up one edge of the rock. A scale shows the rock is about 2 cm long.

#internationalrockday so here is some excellently preserved siltstone that had something *very* interesting growing in it 3.22 billion years ago (the dark stuff) up is to the bottom. #geology #paleontology

Cover of picture book I, ROCK: A Geology Tale by Katie Slivensky and Steph Stilwell.

It's #InternationalRockDay. Who knew Rock had a whole day just for them? 😄

More about Rock here! www.simonandschuster.com/books/I-Rock...

Jokes aside, it's the perfect time to post about your favorite rock. Go on. You know you want to. My favorite rock is BIF (Banded Iron Formation.) What's yours?

Delicate Arch within Arches National Park, Utah, as viewed through another rock formation, known as Frame Arch. In the background, the La Sal Mountains are visible. The sky is bright, suggesting either daylight or illumination from a full moon. The colors are warm, primarily reds and oranges from the sandstone, with blues and whites in the sky

Delicate Arch & Full Moon
One of my all time fav
Happy
#InternationalRockDay

"Sometimes,
the best
therapy
is to take a
long and
lonely
walk"

Extreme.🎶🎤🎸

#InternationalRockDay

youtu.be/acpgignhvxA?...

Happy #InternationalRockDay

It’s #InternationalRockDay! 🎸
If your PC is stuck between a rock and a hard place, I fix that—online, nationwide.
No charge if I can't help. Just honest, rock-solid computer help.
🖥️💥 thattechjeff.com
#TechSupport #ThatTechJeff #SlowPC #RockSolidHelp

Round rock consisting of dark lava full of round vesicles on a wood board. At the Hunterian.

It’s International Rock Day so I have to show one of my favourite rocks, this round vesicular basaltic lava from Jan Mayen! Aren’t those vesicles (bubbles) so perfect!?! #InternationalRockDay #GeoscienceBluesky #WorldRockDay ⚒️🧪

#internationalrockday Turret Arch

A photo of me hugging a large, natural, spherical rock on a rocky pedestal out in the middle of nowhere of a desert landscape in Arizona.

Happy #InternationalRockDay!
Feel free to share one of your favorite rocks below.

Morro Rock and waterfront

Morro Rock and harbor

Hazy Morro Rock from a distance.

#photography #nature #InternationalRockDay
One of my favorites: Morro Rock, AKA the Gibraltar of the Pacific.

Footprint from a dinosaur

Spherical weathering

Obsidian lava flow

Pillow lava cut by a very thin dyke

Today is #InternationalRockDay 🙀 Most humans get it wrong, but as #Cats with #geologists we know better😽
Here, some of our favourite rocks fig1 a #rock with a footprint from a #dinosaur, fig2 a rock with #SphericalWeathering, fig3 a #lavaflow made of #obsidian fig4 #pillowlava

#geologywithcats

Happy
#InternationalRockDay

Happy #InternationalRockDay

Today is national rock day so here's a rock I drew one day
#pixelart #rock #internationalrockday #art

Western U.S. (Utah) landscape with gray to light brown and reddish strata, mostly smoothly weathered mudstone but also with large weathered boulders of sandstone. People (geologists) in the foreground are walking or standing in the lower third of the photo, and the upper third of the photo shows the horizon with thick grayish-white clouds and a patch of blue sky to the right.

In observance of #InternationalRockDay & more than a week after the release of #JurassicWorldRebirth, here's a nice exposure of the Late Jurassic (150+ mya) Morrison Formation in Utah with geologists appreciating its rocks. Photo taken on the Mesozoic Terrestrial Ecosystems '23 field trip. 🧪🪨⚒️🌿🦕🦖

Happy Sunday, grounded gems! 🪨

It’s #InternationalRockDay so I’m rolling into the week with stone cold focus and crystal clear energy.

Rooted, radiant, & rockin’ realness. ✨

❓How are you staying solid today?

#SundayVibes #Sunday #Rock #Grounded #Solid #SelfCare #rocks #digitalart #art #quote

Happy #InternationalRockDay 🪨💎 If you were an otter, which rock would you keep in your pocket?

Celebrate International Rock Day with a rockin’ book! Three sisters spend an adventure-filled (and rock-heavy 🪨) summer in the Canadian wilderness in Summer of Rocks by Jenna Greene. Pick up a copy today! buff.ly/DM74tmy

#InternationalRockDay

For Those About to Rock
We Salute You🤘🏾🎸🎶🎵
Happy International Rock Day
🎸July 13th🤘🏾

Be nice and follow me
👉🏾 t.me/MajorDomChannel
👉🏾 t.me/+LAR8SM8axephMDQx
👉🏾 x.com/_majordom_

~MD

#rocknroll #rock #music #RockDay #InternationalRockDay #LiveAid #DiaMundialDoRock #DiaDoRock

Celebrating International Rock Day with the Queen of Rock’n’Roll: www.teepublic.com/t-shirt/9899...

#TinaTurner #DíadelRock #camiseta #sudadera #Tshirt #hoodie #Rock #DíaMundialdelRock #ReinadelRock #InternationalRockDay #QueenofRocknRoll #InternationalRockDay2025 #DíaMundialdelRock2025

This is what liberals want for America.

#InternationalRockDay

A red hoodoo (a tall vertical rock formation) stands in a snow-coated canyon.

A tall gray rock formation with one sloping slide and a flat top is in the distance of an otherwise flat landscape.

A rocky cliff overlooks a body of water.

A lit-up cafe has a series of stalactites hanging from the ceiling.

Happy #InternationalRockDay!

Rocks really do rock. Let us tell you about some of the kinds we love here at @agu.org

PC: Alex Demas, USGS