About.

A geology channel and visual atlas, run by one person.

I'm Pascal. I make Geoscopy — a geology channel, a visual atlas of rocks and minerals, and an essay archive — for people who've ever picked up a rock and wondered how it got there.

Geology has a strange public-relations problem. It's one of the most consequential sciences we have: it explains where your drinking water comes from, why your city was built where it was, why the ground occasionally decides to fall away under a neighborhood somewhere in the world. And almost nobody outside the field knows any of it. The textbooks are either dense enough to be painful or simplified into uselessness. Most geology online is either documentary filler or high-school review. There's very little made for the curious non-specialist who wants the actual science, delivered like an adult.

That's the gap I'm trying to fill. I make long-form videos, write deep-dive essays, and run a visual atlas of rocks and minerals — plus an A-to-Z glossary that explains terms like cleavage and stratigraphy without the jargon.


What you'll find


The Atlas

A visual reference to rocks and minerals — olivine, quartz, basalt, the whole cast — with clean photographs, identification notes (hardness, streak, cleavage, habit), and the context that makes each one interesting rather than just cataloged. Use it when you find something on a hike and want to know what it is.

The videos

Where I spend most of my time. Each one takes weeks to make: real field footage, real samples, careful animation where it earns its place. I try to pick questions I genuinely want to know the answer to, because those are the ones that turn out well.

The essays

For when a topic doesn't fit in a video — usually because it needs citations, nuance, or the patience of the written word. They're updated when the science updates, with notes on what's settled, what's contested, and what's still a working guess.

The glossary

Exactly what it sounds like: a growing dictionary of geology terms, written in plain language, cross-linked to the articles and videos that use them.

How I work

I start with a question, follow the evidence, and try to stop when the real answer appears — not when I've filled the time. When I'm not sure about something, I say so. When the field is still arguing, I tell you what both sides think. I'm a careful, obsessive explainer who reads the papers, talks to specialists when I need to, and does not publish anything I couldn't defend to a room full of geologists.

Who this is for

Students and teachers looking for clear geology explanations that don't insult their intelligence. Hikers and rockhounds who want to identify what they're holding. Parents answering a child's question about why that hill is there. Working geologists who find it useful to see their field explained to outsiders. And — most of all — anyone who's simply curious about the four and a half billion years of history you walk on every day.

Get in touch

The newsletter goes out once a week: one dispatch, no filler. If you have a rock you can't identify, a topic you want me to cover, or a correction to something I've gotten wrong, write to me — I read everything, and corrections in particular are welcome. This is a living project, and it gets better when readers push on it.

Welcome to Geoscopy.

— Pascal

Jagged icy mountain glacier landscapeSteep rocky mountain peak under clear skySnowy mountain peak with glacier at sunset
Brown volcanic rock texture close-up

Rhyolite

Rhyolite, a silica-rich volcanic rock, is used in construction and research.

Read more
White dolomite crystal mineral cluster

Dolomite

Dolomite is a calcium magnesium carbonate used in construction and agriculture.

Read more
White kernite crystal

Kernite

Kernite is a boron-rich mineral used in glassmaking, detergents, and ceramics.

Read more
Dark black biotite mica mineral specimen

Biotite

Biotite is a dark mica mineral used in insulation and geological studies.

Read more
Calcite crystals on metallic mineral surface

Calcite

Calcite is a trigonal calcium carbonate mineral used mainly in construction for making cement.

Read more
Brown crystals of feldspar mineral specimen

Feldspar

Feldspar is an aluminum silicate used in ceramics, glass, and construction.

Read more
Piece of red and brown bauxite ore

Bauxite

Bauxite is the main aluminum ore, primarily found in Australia.

Read more
Colorful watermelon tourmaline crystal slice

Tourmaline

Tourmaline is a colorful boron silicate mineral used as a gemstone and in electronics.

Read more
Limestone rock with visible fossil imprint

Limestone

Limestone, mainly calcium carbonate, is used in construction, cement, and water treatment.

Read more
Metamorphic rock with dark red garnet crystals

Chlorite

Chlorite, a green phyllosilicate mineral, is used as a geological indicator and industrial filler.

Read more
Shist rock example

Schist

Schist, a layered metamorphic rock rich in mica and quartz, is often used in construction.

Read more
Large basalt on white background

Basalt

Basalt is a dark, fine-grained igneous rock used in construction, monuments, and geological studies.

Read more
Borax mineral specimen

Borax

Borax is a sodium borate used in cleaning and glassmaking.

Read more
Clear barite crystal mineral specimen

Barite

Barite is a barium sulfate mineral used in drilling, shielding, and paints.

Read more
Descloizite mineral crystal cluster

Descloizite

Descloizite is a lead-zinc vanadate mineral, mainly found in Namibia and Mexico.

Read more
Marble close-up

Marble

Marble, a calcium carbonate metamorphic rock, is used in sculpture, architecture, and countertops.

Read more
Muscovite mineral

Muscovite

Muscovite, a mica mineral, is used in insulation, fireproofing, and cosmetics.

Read more
Shiny black coal

Coal

Coal, mainly carbon, is used for energy and steel production.

Read more
Large translucent gypsum mineral specimen

Gypsum

Gypsum, a soft calcium sulfate mineral, is primarily used as plaster or in cement production.

Read more
Diorite rock close up

Diorite

Diorite is a tough igneous rock used in construction, art, and in research.

Read more
Rough beige sandstone rock on white background

Sandstone

Sandstone, composed of quartz and feldspar, is used in construction, paving, landscaping, and glassmaking.

Read more
Bright yellow-green adamite specimen close-up

Adamite

Adamite is a rare, colorful orthorhombic mineral prized by collectors for its vibrant crystals.

Read more
Talc mineral

Talc

Talc, the softest mineral, is used in baby powder, cosmetics, ceramics, and plastics.

Read more
Clear quartz crystal cluster on black background

Quartz

Quartz, a silicon dioxide mineral, is used in jewelry and electronics.

Read more
Monazite mineral crystal cluster

Monazite

Monazite, a group of rare earth minerals, is a key source of rare earth elements.

Read more
Wulfenite crystal specimen

Wulfenite

Wulfenite is a bright orange or yellow mineral, prized by collectors.

Read more
Gray quartzite rock on white background

Quartzite

Quartzite, a durable metamorphic rock made of quartz, is used in construction and countertops.

Read more
Shiny metallic pyrite mineral cluster

Galena

Galena is the main ore of lead and silver, used in batteries and shielding.

Read more
White halite rock salt crystal cluster

Halite

Halite, or rock salt, is a sodium chloride mineral used for seasoning, de-icing, and industry.

Read more
Zircon crystal on beige mineral rock

Zircon

Zircon is a durable mineral used in jewelry, geological dating, and ceramics.

Read more
Vanadinite crystal cluster on white background

Vanadinite

Vanadinite is a bright red mineral, primarily sourced from lead deposits.

Read more
Orange scheelite crystal on gray matrix rock

Scheelite

Scheelite, a calcium tungstate, is the main source of tungsten for tools and alloys.

Read more
Bright green olivine crystal mineral specimen

Olivine

Olivine, a magnesium iron silicate, is used in gemstones (peridot) and refractory materials.

Read more
Green fluorite crystal on yellowish mineral matrix

Fluorite

Fluorite, a colorful calcium fluoride, is used as flux in steelmaking, glass, and as gemstones.

Read more
Amphibole sample on white background

Amphibole

Amphibole is a diverse mineral group used for geological indicators and as insulation.

Read more
Shiny metallic pyrite mineral cluster

Pyrite

Pyrite, or “Fool’s Gold,” is used for sulfur and iron production.

Read more
Green pyroxene crystal mineral specimen

Pyroxene

Pyroxene, a silicate mineral group found in igneous and metamorphic rocks.

Read more
Sample of apatite mineral crystal

Apatite

Apatite is a calcium phosphate mineral found in various colors, primarily used in fertilizers.

Read more
Shiny metallic hematite crystal cluster

Hematite

Hematite is an iron oxide mineral used for iron ore, pigments, and radiation shielding.

Read more
Dark gray shale rock sample

Shale

Shale, a fine-grained sedimentary rock, is used for natural gas, cement, and research.

Read more
Close-up of a granite rock sample

Granite

Granite is a durable igneous rock used in construction, monuments, and countertops.

Read more
Beryl crystals with brown mineral base

Beryl

Beryl is a gemstone mineral, including emerald and aquamarine, and a source of beryllium.

Read more
Shiny black magnetite crystal mineral specimen

Magnetite

Magnetite, an iron oxide with magnetic properties, is used in steel production and catalysts.

Read more
Raw red garnet gemstone close-up

Garnet

Garnet is a group of silicate minerals used as gemstones and abrasives.

Read more
Cluster of shiny brown mica crystals

Mica

Mica is a group of silicate minerals with varying compositions mainly in insulation and electronics.

Read more
Dark blue scorodite crystal cluster mineral specimen

Scorodite

Scorodite, a hydrated iron arsenate, is valued for arsenic containment and as a collector’s mineral.

Read more
Polished sample of a gneiss rock

Gneiss

Gneiss is a durable, banded metamorphic rock used in construction and decoration.

Read more

join.me

Geology made clear, in your inbox.

Get clear, visual explainers on rocks, minerals, deep time, and the most fascinating parts of Earth science from Geoscopy.