GeoFacts Hub

Home
India
Nagpur Road Area
GeoFacts Hub

🌍 Geo Facts | Geology
🪨 Strange Earth • Ancient stories
⏳ Science beneath your feet

26/09/2026

Geochemical criteria for accumulation of minerals as placers

$🌍 What forces shape Earth’s crust?Earth’s crust is constantly being deformed, uplifted, fractured, weathered, and reshap...$

26/09/2026

🌍 What forces shape Earth’s crust?

Earth’s crust is constantly being deformed, uplifted, fractured, weathered, and reshaped by powerful internal and external forces.

🔥 Endogenic forces: Tectonic movements, earthquakes, volcanism, magmatism & isostasy
🌊 Exogenic forces: Weathering, erosion, transportation, deposition & mass wasting

From mountain building and faulting to river erosion and sediment deposition, these forces continuously reshape our planet. 🌎

🔬 Geology is the story of Earth in motion.

26/09/2026

Ever wonder what disseminated ore actually looks like up close? 🪨 Instead of a solid vein, valuable minerals like chalcopyrite are scattered evenly through the host rock. Have you ever spotted disseminated sulfides in the field?

25/09/2026

This image showcases a classic folded mineral vein (likely quartz or a quartz-feldspar mix) hosted within a dark, highly deformed metamorphic rock matrix

25/09/2026

Zealandia, also known by its Māori name Te Riu-a-Māui, is Earth's eighth and youngest continent, sitting 94% submerged beneath the South Pacific Ocean.

25/09/2026

🌋 Lamprophyre vs Kimberlite 💎
Both are mantle-associated igneous rocks, but they have very different geological characteristics.
🔹 Lamprophyre — commonly porphyritic and mafic, commonly alkaline, and typically occurs as d***s and sills.
🔹 Kimberlite — ultramafic, volatile-rich and olivine-rich, commonly forming pipes, d***s and sills, with an important association with primary diamond deposits.
💎 Key takeaway: A mantle-derived rock is not automatically a diamond host. Kimberlite has a distinctive association with primary diamond deposits.
Which one would you identify in the field? 👇

25/09/2026

⛏️ NOT EVERY ORE BODY IS MASSIVE!

Some ore bodies are thin, sheet-like, yet extend over large distances. 👀

That’s a TABULAR ORE BODY — where:

📏 Lateral extent ≫ thickness
📐 Can have a measurable strike & dip
🪨 Occurs within surrounding host rock

🔥 Remember: “Tabular” describes the geometry, not necessarily the origin.

Could you identify one in a geological cross-section? 👇

24/09/2026

🔬 What’s your “Optical Nemesis” in Thin-Section Identification?

Let’s talk petrographic microscopy! 👀

Which mineral gives you the most trouble under cross-polarized light (XPL)?

For me, it’s distinguishing certain feldspars when twinning is poorly developed or unclear.

👉 What mineral challenges you the most?
Share your identification tips or tricks in the comments! 🧪🔬

24/09/2026

⛏️ Concordant vs Discordant Ore Bodies
The key difference is geometry:
🔹 Concordant ore bodies follow the bedding or foliation of the host rock.
🔹 Discordant ore bodies cut across bedding, foliation, or other planar structures.
📌 Easy way to remember:
Concordant = follows the layers
Discordant = cuts across the layers
Understanding this relationship helps interpret ore-body geometry, structural controls, and exploration targets.

24/09/2026

A quick look at where precious metals like gold, silver, and PGMs hide in the Earth's crust and how they form.

Address

Nagpur Road
Nagpur Road Area

Website

https://www.facebook.com/share/19CuXmYyzm/

Alerts

Be the first to know and let us send you an email when GeoFacts Hub posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The School

Send a message to GeoFacts Hub: