Australia
Sources:
New South Wales
- Boggabri
- Mt. Jersualem
- Mt. Nardi
- Narrabri
- Tweed Valley
- Couchy Creek
- Doon Doon
- Jowlet Hill
- Perch Creek
- Pine Log
Queensland
- Agate Creek
- Black Rock Waterhole
- Black Soil Area
- Campsite
- Cave Creek
- Spring Creek
- 'Thunderegg Site'
- Bundaberg "Hummock Creek"
- Chillagoe
- Eumundi
- Mt. Hay
- Wycarbah
- Mt. Tamborine
- Canungra
- Cedar Creek
- Numinbah Valley "Dave's Creek"
- Yandina North Arm
Virginia
- Mooralla
New South Wales
Thundereggs in New South Wales mostly come from the band of rhyolite that Mt Warning erupted through. This band runs from Mt Tamborine in Queensland to Mt Nardi in Northern NSW and is from the late Triassic period, approximately 225 MYO. This band of rhyolite was a subduction zone at the edge of the continent at that time. Throughout the length of this band there are several locations of teggs, from which all of the thundereggs differ. We have Mt. Tamborine, Canungra, Numinbah, Couchy Creek, Mt. Jeruselum, Doon Doon, Perch Creek, Pine Log & Mt. Nardi. Extremely large ones can be found; smaller teggs attached are indicative of this area (by Sharon Costin).
Mt. Jerusalem
size: 68x67 mm
Very unique specimen from a rare location in New South Wales, Mt. Jerusalem. Most t-eggs from this location occure as bizzare cores.
Also interesting are the kinda bizzare cores one can find at this location.
Tweed Valley
size: 77x77 mm
Not specific Tweed Valley thunderegg (NSW, Australia) with water levels a cavity and some interesting gills like pattern at the top right corner.
Couchy Creek
Two interesting and typical Couchy Creek thundereggs from the Tweed Valley.
#1: 76x67mm
#2: 90x113 mm
Doon Doon
size:
A small rough Doon Doon specimen I got from a friend in Australia. Hope to get it cut one day.
Perch Creek
size: 96x105 mm
Great tripple thunderegg with all centers connected. Perch Creek, Tweed Valley.
Pine Log
size: 108x111 mm
Neat thunderegg with water lines from the Pine Log location in the Tweed Valley.
Queensland
There are a lot of sources for thundereggs in Queensland. The best known ones are Agate Creek (3 known sub-sources) and Mt.Hay (a lot of sub-sources).
Agate Creek
Black Soil area
size:
A typical Agate Creek thunderegg coming from the Black Soil area. It shows some really nice colors and level banding.
Campsite area
size:
Two really nice t-eggs from the Campsite area of Agate Creek.
Spring Creek
size:
A large t-egg from Agate Creek with nice level banding and great pattern.
'Thunderegg site'
Bundaberg "Hummock Creek"
Two really typical Hummock Creek mudball eggs (they don't get better than these) from the Bundaberg.
#1: 79x68 mm
#2: 40x38 mm
Eumundi
size: 69x47 mm
All the infromation I have that this is an Eumundi thunderegg.
Mt. Hay
size: 45x49 mm
A typical small Mt. Hay specimen with a nice blueish agate core.
Wycarbah
size:
A thundergg 'soup' from the opposite site of the source of Mt. Hay.
Mt. Tambourine
Canungra
size: 200x115 mm
Very large and rarely seen Canungra thunderegg from the Mt. Tambourine area showing some nice breccia structure.
Cedar Creek
size:
A simple thundergg form the Cedar Creek at Mt. Tambourine with a nice agate filling.
Yandina North Arm
size: 125x86 mm
Another source I don't have any information about. But a nice and interesting thunderegg from the Yandina North Arm.