Augrabies: the manganese coated rocks of the Swartrante by gavvet

View this thread on steempeak.com
geology · @gavvet · (edited)
$13.92
Augrabies: the manganese coated rocks of the Swartrante
Swartrante translates to Black Ridges from Afrikaans.
-

![DSCN1445.JPG](https://steemitimages.com/DQmVjJAuAWAzzd8fYVMAxEe2iDjHuLdCWgLKagVMta2VHMj/DSCN1445.JPG)

They are a stark contrast to the pink granite  gneiss they are intruded into.
-

![DSCN1444.JPG](https://steemitimages.com/DQmQmocbENS7dCbdX3mo4Wop2fWpNVkNG4rmcAQ5cKYrsNC/DSCN1444.JPG)

They are also significantly more resistant to weathering, therefore they form ridges and low hills.
-
![DSCN1458.JPG](https://steemitimages.com/DQmNjiJoUVXbY78HXM8Nq3DEm3MW6nGF2BsHr2ejoh7fHP1/DSCN1458.JPG)

The process of intrusion faulted, sheared and otherwise altered the gneiss it was being forced into.
-

This shearing is visible in patches all along the contact zone between the two rock types. 

![DSCN1461.JPG](https://steemitimages.com/DQmW5uoxmUgjGb9TTa9Q2tPBpW8GG1LNiow7meQGbHTMzEe/DSCN1461.JPG)

The Swartrante are composed entirely of Metagabbro, a rock that contains no quartz and is made up entirely of dark ferromagnesian minerals and feldspar.
-

The black iron/manganes crystals can be seen contrasting with the lighter feldspar crystals in freshly broken rocks. 

As the crystals weather, due to the elements, the manganese coats the outside of the rocks with a thin black coating, giving them their characteristic colour. 


![metagrabo.JPG](https://steemitimages.com/DQmW8BneQDieKeLQYZVWHKRYxt58fmpgZy7dqYq7oBVPPU2/metagrabo.JPG)

The metagrabo layer was exposed by the folding processes very evident from the air, more especially in the rocks to the west of the Swartrante. 

This folding was part of the uplift associated with the breakup of Gondwanaland and the formation of the African continent.

![folding.JPG](https://steemitimages.com/DQmNhQU8ZRCwAntWKVx3TKMUemE1YjEWeNkx7jYA9RyLAEG/folding.JPG)



# Other posts in this series.

[Augrabies - The hidden river](https://steemit.com/rivers/@gavvet/augrabies-the-hidden-river)
[Augrabies - The Falls and Floods](https://steemit.com/geology/@gavvet/augrabies-the-falls-and-floods)
[Augrabies: a "heart of stone" for valentines day.](https://steemit.com/geology/@gavvet/augrabies-a-heart-of-stone-for-valentines-day)
[Augrabies: Reading the geological history written on the walls](https://steemit.com/geology/@gavvet/augrabies-reading-the-geological-history-written-on-the-walls)
[Augrabies: Lizards everywhere](https://steemit.com/herpetology/@gavvet/augrabies-lizards-everywhere)
[Augrabies: Further examples of weathering and erosion types](https://steemit.com/geology/@gavvet/augrabies-further-examples-of-weathering-and-erosion-types)
[Augrabies: Moon rock](https://steemit.com/geology/@gavvet/augrabies-moon-rock)
[Augrabies: how moon rock was formed and is continuing to being shaped](https://steemit.com/geology/@gavvet/augrabies-how-moon-rock-was-formed-and-is-continuing-to-being-shaped)
[Augrabies: Warps, twists and valley widening](https://steemit.com/geology/@gavvet/augrabies-warps-twists-and-valley-widening)
[Augrabies: Moon rock - not only interesting to us.](https://steemit.com/geology/@gavvet/augrabies-moon-rock-not-only-interesting-to-us)
👍  , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , and 253 others
👎  
properties (23)
post_id2,026,918
authorgavvet
permlinkaugrabies-the-manganese-coated-rocks-of-the-swartrante
categorygeology
json_metadata"{"app": "steemit/0.1", "format": "markdown", "links": ["https://steemit.com/rivers/@gavvet/augrabies-the-hidden-river", "https://steemit.com/geology/@gavvet/augrabies-the-falls-and-floods", "https://steemit.com/geology/@gavvet/augrabies-a-heart-of-stone-for-valentines-day", "https://steemit.com/geology/@gavvet/augrabies-reading-the-geological-history-written-on-the-walls", "https://steemit.com/herpetology/@gavvet/augrabies-lizards-everywhere", "https://steemit.com/geology/@gavvet/augrabies-further-examples-of-weathering-and-erosion-types", "https://steemit.com/geology/@gavvet/augrabies-moon-rock", "https://steemit.com/geology/@gavvet/augrabies-how-moon-rock-was-formed-and-is-continuing-to-being-shaped", "https://steemit.com/geology/@gavvet/augrabies-warps-twists-and-valley-widening", "https://steemit.com/geology/@gavvet/augrabies-moon-rock-not-only-interesting-to-us"], "image": ["https://steemitimages.com/DQmVjJAuAWAzzd8fYVMAxEe2iDjHuLdCWgLKagVMta2VHMj/DSCN1445.JPG"], "tags": ["geology", "ridges", "geomorphology"]}"
created2017-02-23 09:26:12
last_update2017-02-23 16:06:45
depth0
children8
net_rshares43,478,791,451,686
last_payout2017-03-26 10:27:21
cashout_time1969-12-31 23:59:59
total_payout_value13.646 SBD
curator_payout_value0.269 SBD
pending_payout_value0.000 SBD
promoted0.000 SBD
body_length3,085
author_reputation888,973,651,263,851
root_title"Augrabies: the manganese coated rocks of the Swartrante"
beneficiaries[]
max_accepted_payout1,000,000.000 SBD
percent_steem_dollars10,000
author_curate_reward""
vote details (318)
@mars9 · 
Hello my brother. I like this the Post
properties (22)
post_id2,026,935
authormars9
permlinkre-gavvet-augrabies-the-manganese-coated-rocks-of-the-swartrante-20170223t093335198z
categorygeology
json_metadata"{"app": "steemit/0.1", "tags": ["geology"]}"
created2017-02-23 09:32:15
last_update2017-02-23 09:32:15
depth1
children1
net_rshares0
last_payout2017-03-26 10:27:21
cashout_time1969-12-31 23:59:59
total_payout_value0.000 SBD
curator_payout_value0.000 SBD
pending_payout_value0.000 SBD
promoted0.000 SBD
body_length38
author_reputation26,573,235,992,720
root_title"Augrabies: the manganese coated rocks of the Swartrante"
beneficiaries[]
max_accepted_payout1,000,000.000 SBD
percent_steem_dollars10,000
@gavvet · 
Nice lunar eclipse... clearer than mine
👍  , ,
properties (23)
post_id2,028,193
authorgavvet
permlinkre-mars9-re-gavvet-augrabies-the-manganese-coated-rocks-of-the-swartrante-20170223t150339474z
categorygeology
json_metadata"{"app": "steemit/0.1", "tags": ["geology"]}"
created2017-02-23 15:03:42
last_update2017-02-23 15:03:42
depth2
children0
net_rshares535,254,514,597
last_payout2017-03-26 10:27:21
cashout_time1969-12-31 23:59:59
total_payout_value0.000 SBD
curator_payout_value0.000 SBD
pending_payout_value0.000 SBD
promoted0.000 SBD
body_length39
author_reputation888,973,651,263,851
root_title"Augrabies: the manganese coated rocks of the Swartrante"
beneficiaries[]
max_accepted_payout1,000,000.000 SBD
percent_steem_dollars10,000
author_curate_reward""
vote details (3)
@edy.alka · 
nice info
properties (22)
post_id2,027,076
authoredy.alka
permlinkre-gavvet-augrabies-the-manganese-coated-rocks-of-the-swartrante-20170223t102518922z
categorygeology
json_metadata"{"app": "steemit/0.1", "tags": ["geology"]}"
created2017-02-23 10:25:24
last_update2017-02-23 10:25:24
depth1
children1
net_rshares0
last_payout2017-03-26 10:27:21
cashout_time1969-12-31 23:59:59
total_payout_value0.000 SBD
curator_payout_value0.000 SBD
pending_payout_value0.000 SBD
promoted0.000 SBD
body_length9
author_reputation6,760,829,753,919
root_title"Augrabies: the manganese coated rocks of the Swartrante"
beneficiaries[]
max_accepted_payout1,000,000.000 SBD
percent_steem_dollars10,000
@gavvet · 
Glad you liked it
👍  , ,
properties (23)
post_id2,028,392
authorgavvet
permlinkre-edyalka-re-gavvet-augrabies-the-manganese-coated-rocks-of-the-swartrante-20170223t154517264z
categorygeology
json_metadata"{"app": "steemit/0.1", "tags": ["geology"]}"
created2017-02-23 15:45:21
last_update2017-02-23 15:45:21
depth2
children0
net_rshares506,925,128,277
last_payout2017-03-26 10:27:21
cashout_time1969-12-31 23:59:59
total_payout_value0.000 SBD
curator_payout_value0.000 SBD
pending_payout_value0.000 SBD
promoted0.000 SBD
body_length17
author_reputation888,973,651,263,851
root_title"Augrabies: the manganese coated rocks of the Swartrante"
beneficiaries[]
max_accepted_payout1,000,000.000 SBD
percent_steem_dollars10,000
author_curate_reward""
vote details (3)
@germanlifestyle · 
The next great Post.Thank you very much @gavvet.
properties (22)
post_id2,027,580
authorgermanlifestyle
permlinkre-gavvet-augrabies-the-manganese-coated-rocks-of-the-swartrante-20170223t124342980z
categorygeology
json_metadata"{"app": "steemit/0.1", "users": ["gavvet"], "tags": ["geology"]}"
created2017-02-23 12:43:45
last_update2017-02-23 12:43:45
depth1
children1
net_rshares0
last_payout2017-03-26 10:27:21
cashout_time1969-12-31 23:59:59
total_payout_value0.000 SBD
curator_payout_value0.000 SBD
pending_payout_value0.000 SBD
promoted0.000 SBD
body_length48
author_reputation58,284,832,879,848
root_title"Augrabies: the manganese coated rocks of the Swartrante"
beneficiaries[]
max_accepted_payout1,000,000.000 SBD
percent_steem_dollars10,000
@gavvet · 
Thanks
👍  ,
properties (23)
post_id2,028,190
authorgavvet
permlinkre-germanlifestyle-re-gavvet-augrabies-the-manganese-coated-rocks-of-the-swartrante-20170223t150315741z
categorygeology
json_metadata"{"app": "steemit/0.1", "tags": ["geology"]}"
created2017-02-23 15:03:18
last_update2017-02-23 15:03:18
depth2
children0
net_rshares482,964,912,476
last_payout2017-03-26 10:27:21
cashout_time1969-12-31 23:59:59
total_payout_value0.000 SBD
curator_payout_value0.000 SBD
pending_payout_value0.000 SBD
promoted0.000 SBD
body_length6
author_reputation888,973,651,263,851
root_title"Augrabies: the manganese coated rocks of the Swartrante"
beneficiaries[]
max_accepted_payout1,000,000.000 SBD
percent_steem_dollars10,000
author_curate_reward""
vote details (2)
@jlufer · 
Una vez mas un buen trabajo, muchas gracias por estos mensajes interesantes felicitaciones querido amigo @ gavvet
properties (22)
post_id2,027,911
authorjlufer
permlinkre-gavvet-augrabies-the-manganese-coated-rocks-of-the-swartrante-20170223t135708925z
categorygeology
json_metadata"{"app": "steemit/0.1", "tags": ["geology"]}"
created2017-02-23 13:57:24
last_update2017-02-23 13:57:24
depth1
children1
net_rshares0
last_payout2017-03-26 10:27:21
cashout_time1969-12-31 23:59:59
total_payout_value0.000 SBD
curator_payout_value0.000 SBD
pending_payout_value0.000 SBD
promoted0.000 SBD
body_length113
author_reputation446,683,592,150,961
root_title"Augrabies: the manganese coated rocks of the Swartrante"
beneficiaries[]
max_accepted_payout1,000,000.000 SBD
percent_steem_dollars10,000
@gavvet · 
Me alegro de que te haya gustado
👍  , ,
properties (23)
post_id2,028,188
authorgavvet
permlinkre-jlufer-re-gavvet-augrabies-the-manganese-coated-rocks-of-the-swartrante-20170223t150251944z
categorygeology
json_metadata"{"app": "steemit/0.1", "tags": ["geology"]}"
created2017-02-23 15:02:54
last_update2017-02-23 15:02:54
depth2
children0
net_rshares535,254,513,348
last_payout2017-03-26 10:27:21
cashout_time1969-12-31 23:59:59
total_payout_value0.000 SBD
curator_payout_value0.000 SBD
pending_payout_value0.000 SBD
promoted0.000 SBD
body_length32
author_reputation888,973,651,263,851
root_title"Augrabies: the manganese coated rocks of the Swartrante"
beneficiaries[]
max_accepted_payout1,000,000.000 SBD
percent_steem_dollars10,000
author_curate_reward""
vote details (3)
Help/Feedback