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NEW ACQUISITIONS


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HENBURY CRATERS, NORTHERN TERRITORY, AUSTRALIA


            Henbury Craters, Australia
Iron. Octahedrite, medium. (IIA) “CM” REF: P. 165, “HBIM” REF: P. 638, and “ARN’S” REF: P. 130. Also see “Meteorite Craters and Impact Structures of the Earth”, P. Hodge, P. 67-70 for additional information on the Henbury Craters.  O. Richard Norton, in “Rocks From Space”, has provided a condensed description of the theory on the formation of the craters, with descriptions of the iron meteorites found there.  See pages 138-142, where Norton has included several black and white photos of specimens, as well as an aerial view showing three of the craters. 

The Henbury Crater field includes approximately 13 craters, and was first identified about 1931. The Aborigines, however, were aware of the Henbury Craters at a much earlier date and, based upon their legends, it is speculated by researchers that when the Henbury event occurred, it may have been witnessed by the Aborigines living in the area at that time. The largest crater is elliptical, measuring approximately 720 X 360 feet (another report gives the size as 180 X 140 meters), and the smallest crater measures only about 6 meters in diameter. 
 

The distribution and appearance of Henbury irons suggests that the Henbury Craters were formed by a small swarm of many individual meteorites. Many the meteorites fell intact and buried themselves, and recovered examples of this type sometimes show the typical regmaglypts and flight orientation seen on iron meteorites from other worldwide localities. Most of the larger members of the fall, however, are presumed to have exploded before, and/or upon impact, producing quantities of bent and/or twisted masses with shrapnel-like form.  Many specimens have sharp, ragged edges, attesting to the great forces and heat to which they were subjected.  Polished and etched specimens from Henbury will show different characteristics, depending upon their method of formation, i.e.: 1. original, unshocked specimens which fell and were not effected by the explosions, or 2. shocked specimens which were subjected to stress by high heat, or mechanical deformation caused by the above-ground, as well as inter-crater explosions. Some polished/etched specimens will exhibit stressed areas, as well as areas where the Widmanstatten pattern is pronounced, and sharply defined.  

All of the specimens in the following photographs were legally field collected circa 1971.  The natural specimens all have a thin, reddish-brown outer oxide layer, typically found on Henbury specimens.                      

Items 1771, 1772, and 1780 have been professionally prepared, and the slightly higher price / gram reflects the cost of specimen preparation.

NOTE:  Any of the natural specimens weighing > 100 grams can be custom cleaned if you would prefer the matte-luster, metallic steel gray surface for exhibit purposes.   Since the natural reddish-brown oxide layer is quite thin on Henbury irons, a very minimal amount of weight loss is experienced in the cleaning process – usually less than .50 gram on the smaller specimens,  up to only 1.0 to 2.0 grams on the larger pieces.
 

 

 

ITEM NO.

WEIGHT
(GRAMS)

SPECIMEN SIZE
(INCHES)

PHYSICAL DESCRIPTION / FEATURES

PRICE  /
GRAM

SPECIMEN
PRICE

 

1766

12.60

1

5/8

3/8

  CI, N

$ 2.50

$    31.50

 

1767

13.35

1

3/4

3/8

  CI, N

$ 2.50

$    33.50

 

1768

37.80

1 1/2

7/8

5/8

  CI, N

$ 2.50

SOLD

 

1769

46.38

1 3/8

1 1/8

3/4

  CI, N, REG, FO

$ 2.50

$  116.00

 

1770

68.42

1 1/2

1

5/8

  CI, N

$ 2.00

SOLD

 

1771

14.75

5/8

5/8

1/2

 CI, CL

$ 2.50

$    37.00

 

607G

45.85

1 3/4

1 1/4

3/8

 CI, N, w/ a 5/8” “tail” on one edge

$ 2.50

$  114.50

 

1772

34.40

1

5/8

3/4

 EC, POL (1)

$ 2.50

SOLD

 

1773

48.60

2

1

3/8

 CI, N, w/ a 5/8” “tail” on one edge

$ 2.50

SOLD

 

1774

45.17

1 1/4

1

5/8

 CI, N

$ 2.50

$  113.00

 

1775

70.15

2 1/4

1 1/8

5/8

 CI, N, FO

$ 2.00

$  140.25

 

1776

61.00

1 1/2

1 1/2

5/8+

 CI, N

$ 2.00

SOLD

 

1777

105.18

2

1 1/4

3/4

 CI, N

$ 2.00

$  210.25

 

607N

132.12

2 1/2

1 7/8

3/4

 CI, N

$ 2.00

$  264.25

 

1778

39.60

1 1/2

1 1/4

3/8+

 CI, N

$ 2.50

SOLD

 

1779

106.90

1 7/8

1 5/8

7/8

 CI, N, REG

$ 2.00

SOLD

 

1780

565.60

3 7/8

1 5/8

1 5/8

 EC, ET, REG

$ 2.00

$1131.25

 

607R

632.90

3 1/8

2 3/4

1 1/2

 CI, N, FO

$ 1.75

$1107.50

 

607S

811.90

4 5/8

2 1/2

1 1/4

 CI, N, FO

$ 1.75

$1420.75

 

607T

364.65

3 5/8

1 3/4

1 1/4

 CI, N, REG

$ 1.75

$  638.25

 

1781

256.35

4 3/8

2 3/8

5/8

 CI, N, FO, 2 specimens attached

$ 1.75

SOLD

 

1782

330.00

4 1/2

3 1/8

3/4

 CI, N

$ 1.75

$  582.75

 

607W

278.00

3

2 1/4

7/8

 CI, N, FO

$ 1.75

SOLD

 

1783

561.50

3 7/8

3

3/4

 CI, N, REG

$ 1.75

$  982.50

Click on specimens to see larger pictures

C   = cut (   ) = quantity of cuts                     
CI  = complete individual                              
CL = cleaned                                                                         
EC = end cut                                                                                      
ET = etched w/ Widmanstatten pattern        
F    = fragment                                                                                                          
FO = exhibits flight orientation
N   = natural
POL  = polished (   ) = quantity of polished surfaces
REG = regmaglypts

Price Schedule

< 50 grams $2.50 / gram
  51-150 grams    $2.00 / gram
 > 151 grams    $1.75 / gram


          





 


1766

1767

1768

1769

1770

1771

607G

1772

1773

1774

1775

1776

1777

607N

1778

1779

1780

607R

607S

607T

1781

607W FRONT

607W BACK
 
1782 FRONT

1782 BACK
   
             

1783 FRONT

1783 LEFT SIDE

1783 BACK

1783 RIGHT SIDE
     

 

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