Geologic maps Map A Map B Map C Jrt Db Kg 15 12 Tb 43 Dn Sh 27 Sc 10 56 Dn Dt Db

Question

Geologic maps Map A Map B Map C Jrt Db Kg 15 12 Tb 43 Dn Sh 27 Sc 10 56 Dn Dt Db Dn Kb Dp Db Tb Tertiary basalt Jrt Jurassic Tinta Fm. Triassic Jones Sh Devonian Tella Fm. Cretaceous granite Da Devonian Alsen Fm. Db Devonian Becraft Ls. Dn Devonian Norfolk Sh. Sc Silurian Cligfell Frm Kal Cretaceous Altoona Fm. Kb Cretaceous Barrell Fm. Dp Devonian Potomoo Ls. Sw Silurian Wala Sh. [S] Silurian Jack Fm. Ot Ordovician Trent Fm. Db Devonian Bouser Fm. Dn Devonian Norfolk Sh. Sh Silurian Hallo Fm. (b) Describe the geologic features of Map B aged strata are folded into a(n). The hinge of the fold Are the folded layers trends Do the folded layers plunge? intrudes the western portion of the folded layers (give age, rock, and type of the intrudes both the folded layers and the intrusion described in (i) (give age, rock, and If not, which side is steeper? symmetrical? intrusion) type of the intrusion).

Explanation / Answer

(b) Geological features of map B

i. Silurian-Devonian aged strata are folded into an antiform. The hinge of the fold trends NW-SE. This is a non-plunging fold, because the strike lines are nearly parallel in the both side. Folded layers are nearly symmetrical, not totally. The western side is steeper.

ii. A Cretaceous granite batholith intrudes the western portion of the folded layers.

iii. A Tertiary basaltic dyke intrudes both the folded layers and the intrusion described.

Related Questions

Navigate

• Browse (All)
• Browse G
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.