[meteorite-list] geoablation features and rocks in South Australia: Rich Murray 2011.09.25: Pierson Barretto 2011.09.27

From: Rich Murray <rmforall_at_meteoritecentral.com>
Date: Tue, 27 Sep 2011 21:31:10 -0700
Message-ID: <CAHqJ8pZBiHDo-wFFbxKH78s7weJ6z=Erz1A64WcyPsbWwdu94Q_at_mail.gmail.com>

Re: geoablation features and rocks in South Australia: Rich Murray
2011.09.25: Pierson Barretto 2011.09.27

Hello Pierson,

I looked on Google Earth for well formed round craters and lakes in
the region NE of Adelaide, that also had good ground photos.

First, Google Maps for
"Kinchega National Park, Menindee NSW 2879, Australia"

http://maps.google.com/maps/place?hl=en&cid=1082563435369012480&ved=0CB4QjAVIAA&sa=X&ei=85eCTpblOaeFiAKJ6vGqCQ

Terrain and Map views show that these lakes are a fractal cluster with
many smaller lakes, with several other very similar clusters within a
square 200X200 km E and S of Broken Hill, S to Mildura.

This uniform pattern, not yet erased by erosion, allows the paradigm
of formation in the Holocene by a barrage of air burst directed
complex hot gas jets that excavate rapidly via geoablation, leaving a
blanket of fine sand and litter of sharp edged, broken fragments of
all sizes on this very flat landscape.

Ground studies can test this by checking rocks for melt and surface glazes.

http://www.panoramio.com/photo/17964407?source=wapi&referrer=kh.google.com
http://v8.cache1.c.bigcache.googleapis.com/static.panoramio.com/photos/original/17964407.jpg?redirect_counter=1
3307X1134 Px
[ double click on initial image for large and larger views ]
[ Pamamaroo Lake, 9.5 km size NS,
-32.286789 142.465770 .061 km el,
14 m lower than .075 km el land to W and E, ]
Every lake looks different around Minindee
by digisol1990
in Menindee NSW 2879, Australia
32? 17' 30.92" S 142? 28' 10.20" E


http://www.panoramio.com/photo/17923558?source=wapi&referrer=kh.google.com
http://static.panoramio.com/photos/original/17923558.jpg
Untitled
by digisol1990
in Kinchega National Park, Menindee NSW 2879, Australia
32? 25' 47.34" S 142? 14' 58.57" E
[ Lake Cawndilla 11 km size WE, .060 km el,
18 m lower than .078 km el to W,
full slant view of lake ]


http://www.panoramio.com/photo/6685876?source=wapi&referrer=kh.google.com
http://v1.cache1.c.bigcache.googleapis.com/static.panoramio.com/photos/original/6685876.jpg?redirect_counter=1
Looking South East [West] from Lake Pamamaroo towards Menindee
by Ian R Garling
[ straight road on very flat fine light brown sand with grass and shrubs ]
2048X1536 Px
32? 19' 5.09" S 142? 27' 31.55" E

within mutual service, Rich


On Tue, Sep 27, 2011 at 6:38 PM, Pierson Barretto <cosmopier at gmail.com> wrote:

Hello Rich

Yes, Australia seems to have been quite struck by meteoroids.

The impactites are very interesting.

The northeast region of Adelaide is one of my favorites by there.

http://maps.google.com.br/maps?hl=pt-BR&ll=-33.646636,141.569824&spn=1.442747,2.458191&t=k&z=9&vpsrc=6

Very nice.

regards
pierson
Received on Wed 28 Sep 2011 12:31:10 AM PDT