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Turn your notes into an explorable obsidian mind map

Upload a lecture PDF, slides, or typed notes on volcanic glass and get an editable mind map with branches for formation, composition, and fracture you can expand section by section.

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How an obsidian mind map keeps volcanic glass facts connected

Volcanic glass is hard to memorize from a textbook page alone, so an obsidian mind map helps you see how its formation, silica content, fracture pattern, and dating methods connect to one another.

Start with one central topic and no more than seven main branches.
Keep each sub-point to a few words so you can recall it without rereading.
Mark the branches you find hardest and review them first.
Check each branch against your lecture slides or textbook before you rely on it.

Example obsidian mind map branches for geology students

Obsidian formationRapid cooling of silica-rich lava · Too little time for crystals to grow · Results in a glassy, non-crystalline solid

Conchoidal fractureBreaks into smooth, curved, shell-like surfaces · Produces very sharp edges · Historically used for stone blades and tools

Chemical compositionRoughly 70 percent silica · Low water content compared with many lavas · Chemically similar to granite

Color causesIron impurities give black or dark brown color · Snowflake obsidian has cristobalite inclusions · Trace elements alter the shade

Hydration datingWater slowly soaks into the glass over time · Forms a measurable hydration rind · Archaeologists use rind thickness to estimate age

Generate the full set

Branches from your own material

DeckOwl reads PDF, DOCX, PPTX, text, and photos of pages, then organizes the main ideas into branches that match your source.

Editable and explorable

Edit any branch or expand a section to see the details beneath it, so the map grows with your course instead of staying fixed.

Study from the same material

Turn the same notes into flashcards with spaced repetition or quizzes with explanations when you are ready to test yourself.

How it works

Upload your notes or a PDF

Add a lecture PDF, slide deck, DOCX file, pasted notes, or a photo of a textbook page.

Generate the mind map

DeckOwl pulls out the central topic and sorts related concepts into main branches and sub-points.

Explore and edit

Open each branch, fix anything that does not match your course, and review the sections you find hardest.

A useful map starts with one central node and splits into a few main branches, such as how the rock forms, what it is made of, and how it is used or identified. Each branch then holds short sub-points you can check against your lecture notes.

Because the map is generated from your own material, the branches reflect what your instructor actually covered. You can edit anything that is missing or off, then turn the same content into quiz questions before the exam.

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Obsidian Mind Map Examples

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Frequently asked questions

How many branches should an obsidian mind map have?

Aim for five to seven main branches, one for each major property or process, and keep sub-points to two to four words each. Too many branches make the map hard to scan during review.

How do I study obsidian for a geology exam?

Focus on how it forms, its high silica content, its conchoidal fracture, and hydration dating. Test yourself on each branch until you can explain it without looking at your notes.

Is the mind map editable?

Yes. You can edit branches and explore each section, so you can correct anything the map gets wrong or add details from your own lectures.

Is it free to try?

Yes. The free plan includes 3 generations per month and studying in the browser, and no credit card is needed to start. Exports require Plus at $39/year or $7.99/month.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.