ASBOG FG Practice Questions
2025/2026 Exam All Answers and
Illustrations Given
What deposit is most closely associated with REEs? - 🧠ANSWER
✔✔Alkaline igneous rocks - along carbonatites are enriched in REE
What is the oldest age of typical oceanic crust - 🧠ANSWER ✔✔180 million
years - most ocean crust gets subducted
Sole marks - 🧠ANSWER ✔✔indicate the contact between a sand and an
overlying clay - sand fills depressions in the underlying clay creating
convex wavelike forms of the substrate
, plagioclase, quartz, biotite, and hornblende would most likely be found in a
- 🧠ANSWER ✔✔dacite - has 20 to 60% quartz, an equally good answer
would be rhyolite on the volcanic side or grandodiorite on the plutonic side
What are oscillatory waves in inland bodies of water called? - 🧠ANSWER
✔✔seiches - this is an oscillating wave in an enclosed body of water
triggered by earthquakes, tsunamis, severe storm fronts, or strong winds
A 4:1 (H:V) slope has what grade? what slope angle? - 🧠ANSWER
✔✔25%, 14 degrees
Continental convergent plate margins are characterized by - 🧠ANSWER
✔✔melanges of feldspathic sandstone, siltstone, and shale
Sphalerite, willemite, and smithsonite are all - 🧠ANSWER ✔✔zinc ores
Given a bed with an orientation of N65W, 25S, what is the corresponding
attitude - 🧠ANSWER ✔✔25 degrees, S 25W
All of these answers are dip and dip direction format which is 90 degrees
from strike. That means that all teh dip will always be the same, so you just
need to select the corresponding dip direction. perpendicular tot eh strike of
65 degrees to the south would make the dip direction to the southwest. We
2025/2026 Exam All Answers and
Illustrations Given
What deposit is most closely associated with REEs? - 🧠ANSWER
✔✔Alkaline igneous rocks - along carbonatites are enriched in REE
What is the oldest age of typical oceanic crust - 🧠ANSWER ✔✔180 million
years - most ocean crust gets subducted
Sole marks - 🧠ANSWER ✔✔indicate the contact between a sand and an
overlying clay - sand fills depressions in the underlying clay creating
convex wavelike forms of the substrate
, plagioclase, quartz, biotite, and hornblende would most likely be found in a
- 🧠ANSWER ✔✔dacite - has 20 to 60% quartz, an equally good answer
would be rhyolite on the volcanic side or grandodiorite on the plutonic side
What are oscillatory waves in inland bodies of water called? - 🧠ANSWER
✔✔seiches - this is an oscillating wave in an enclosed body of water
triggered by earthquakes, tsunamis, severe storm fronts, or strong winds
A 4:1 (H:V) slope has what grade? what slope angle? - 🧠ANSWER
✔✔25%, 14 degrees
Continental convergent plate margins are characterized by - 🧠ANSWER
✔✔melanges of feldspathic sandstone, siltstone, and shale
Sphalerite, willemite, and smithsonite are all - 🧠ANSWER ✔✔zinc ores
Given a bed with an orientation of N65W, 25S, what is the corresponding
attitude - 🧠ANSWER ✔✔25 degrees, S 25W
All of these answers are dip and dip direction format which is 90 degrees
from strike. That means that all teh dip will always be the same, so you just
need to select the corresponding dip direction. perpendicular tot eh strike of
65 degrees to the south would make the dip direction to the southwest. We
