Intro to Geol Thailand

How many tectonic plates is Thailand composed of?

• 2

• 3

• 4

• 5

Where did Indochina Terrane derive from?

• Western Gondwana

• Eastern Gondwana

• Eastern Laurasia

• Western Laurasia

When did the Paleo-Tethys ocean open?

• Early Ordovician Period

• Early Silurian Period

• Early Devonian Period

• Early Permian Period

What is the age of the oldest rocks found in Thailand?

• Silurian

• Ordovician

• Cambrian

• Precambrian

Where are the oldest rocks found in Thailand?

• Southern region

• Western region

• Northern region

• All of above

What does Chiang Mai-Chiang Rai Suture Zone represent?

• Segment of the Paleo-Tethys suture zone

• Closure of a back-arc basin

• Accretionary prism

• Permo-Triassic volcanic arc

What types of rocks should we expect to find in Chiang Mai-Chiang Rai suture zone?

• Limestone

• Basalt

• Deformed clastic rocks

• All of above

What does Nan-Uttaradit suture represent?

• Main Paleo-Tethys

• Fold and thrust belt

• Closed back-arc basin

• Island Arc

What does Inthanon Zone represent?

• Permo-Triassic volcanic arc

• A fold and thrust belt west of the suture zone

• The suture zone

• Paleo-Tethys

What does the Sukhothai Zone represent?

• Oceanic Island Arc formed by a hotspot

• Island arc terrane formed by closure of back-arc basin

• Island arc terrane formed by Paleo-Tethys subduction

• Accretionary prism