FIELD MASTERCLASS ON READING DYKE

THE LANGTANG DYKE

A Field Masterclass in Reading Intrusive Contacts,  Plateau State, Nigeria

Most people learn what a dyke is from a diagram in a textbook. Here, you watch one, cutting live through a granite quarry wall ,  while a field geologist with 20 years of experience across Nigeria and sub-Saharan Africa reads the contact out loud, in real time, on camera.

This isn't a lecture. It's a real outcrop, a real quarry near Langtang, and the exact reasoning a professional geologist uses to turn what's in front of him into a geological story: a coarse-grained granite host, cut twice by a rust-stained tabular intrusion, a textbook cross-cutting relationship you can actually see, and a structural setting explorationists are trained to notice.

In under 10 minutes, you'll learn to:

• Recognise a dyke in the field from colour, grain size, and geometry alone
• Apply cross-cutting relationships to work out relative age, no lab required
• Describe a contact the way a professional does: sharp or diffuse, stained or fresh
• Read how joints and fractures control where a dyke intrudes
• Connect an intrusive contact to real exploration significance, responsibly
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Taught by Dr. NC Gideon:  geologist, geophysicist, and mineral economist

His field method, separating what's observed from what's interpreted, is the single most useful habit this masterclass hands you.

Whether you're a geology student preparing for your first field school, an early-career geologist heading to site, or a mapping trainee who's only ever seen a dyke drawn on a cross-section, this is the closest you'll get to standing on that outcrop yourself.

Includes: full HD field video · timestamped companion notes · glossary of terms · lifetime access.

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