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Geology Quiz (OQ) - IPY

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Shidzidzii
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Re: Geology Quiz (RV)

Unread post by Shidzidzii » Thu Feb 26, 2009 7:53 pm

Here is the answer , and then a fresh single one , to get the quiz rolling again .

1. Granite , Gneiss , Gabbro , Greenstone and Pegmatite .

2. Archaen about 3,500 million years ago.

3. South-west of Letaba camp at Nhlanganini dam and Shilawuri .
South-west of Skukuza - Siyalu , Shirimantanga , Mathekenyani , Napi , Shitlave , Shabeni , Ship mountain , Afsaal , Steilberg (S120) and Malelane .

Anthony , the koppies around Phalabora , Shikumbu and Masorini , are Syenite which is a volcanic intrusion (later on in time) into the older continental rocks . But they are also very hard so slowly weather into koppies .
Last edited by Shidzidzii on Fri Feb 27, 2009 9:41 am, edited 2 times in total.

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Shidzidzii
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Re: Geology Quiz (RV)

Unread post by Shidzidzii » Thu Feb 26, 2009 7:56 pm

The youngest rocks (180 million years) in the KNP are found on the Lebombo range .
What is the predominant rock here ?

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Re: Geology Quiz (RV)

Unread post by KEPs » Fri Feb 27, 2009 10:37 am

Rhyolite :D
Interesting also is the fact that the Lebombo range is the only place rhyolite occurs in South Africa.

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Re: Geology Quiz (RV)

Unread post by Shidzidzii » Fri Feb 27, 2009 11:15 am

Correct , you are IT .

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Re: Geology Quiz (RV)

Unread post by KEPs » Fri Feb 27, 2009 7:52 pm

Staying with rhyolite, what is the difference between rhyolite and granite?

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Imberbe
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Re: Geology Quiz (RV)

Unread post by Imberbe » Sun Mar 01, 2009 8:46 pm

If I remember correctly:

Granite: Intrusive igneous rock(Solidified below ground), large crystals.
Rhyolite: Extrusive igneous rock (Solidified above ground), small crystals.
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Re: Geology Quiz (RV)

Unread post by KEPs » Mon Mar 02, 2009 1:54 pm

Imberbe: :clap: You remembered correctly. Rhyolite can also be described as granite that boiled over.
Your turn.

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Re: Geology Quiz (RV)

Unread post by KEPs » Fri Mar 06, 2009 12:17 pm

Mr I :yaya:

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Re: Geology Quiz (RV)

Unread post by Imberbe » Fri Mar 06, 2009 3:17 pm

Oops!

Why is the area surrounding Satara such a haven for big predators such as lion. Describe the process leading to this, keeping in mind that this is a geology quiz.
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Re: Geology Quiz (RV)

Unread post by Shidzidzii » Tue Mar 10, 2009 7:10 am

Basalt plains .
They have a clayey fertile topsoil which retain pools of rainwater and stimulate sweet grasses (also a result of low average rainfall) . Therefore lots of plains game - food for the big cats .

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Re: Geology Quiz (RV)

Unread post by Imberbe » Wed Mar 11, 2009 10:55 pm

:thumbs_up: Nature conservation starts at soil level!

You're IT!
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Re: Geology Quiz (RV)

Unread post by Shidzidzii » Fri Mar 13, 2009 10:49 am

Augrabies falls are well known for the spectacular gorge and whalebone rock carved out by water erosion over the past 70 million years .
What kind of igneous rock is exposed ?

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Re: Geology Quiz (RV)

Unread post by Anthony » Sat Mar 28, 2009 3:01 am

Intrusive igneous rock :D
:huh: What?? Its an answer... :huh:
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Re: Geology Quiz (RV)

Unread post by onewithnature » Sat Mar 28, 2009 4:04 am

Quartz-poor, black igneous rock?
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Re: Geology Quiz (RV)

Unread post by Shidzidzii » Mon Mar 30, 2009 12:40 pm

No correct answers yet .


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