| LOCATION |
| Map |
Show Map
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| Address |
Pondalowie Bay Road INNESTON |
| Locality |
|
| Accuracy |
H - high level confidence |
| Council Area |
Yorke Peninsula Council |
| Polygon Type |
B - Building footprint |
| DESCRIPTION |
| Details (Known As) |
Inneston Lake and Deep Lake Geological Sites, Dhilba Guuranda-Innes National Park [Designated places of geological and palaeontological significance] |
| Registered Name |
Inneston Lake and Deep Lake Geological Sites |
| Significance |
Inneston Lake and Deep Lake are among a small number of places in South Australia where living stromatolites occur. Stromatolites (structures formed in rock by an ecosystem composed of several extremely ancient life forms, bacteria and cyanobacteria) have long been known in the fossil record and are among the earliest life forms known, existing 3,500 million years ago. They were believed to have become extinct about 100 million years ago, until the discovery of recent stromatolites in several lakes in South Australia and Western Australia.
Inneston and Deep Lakes are of outstanding scientific importance because of the occurrence of living stromatolites, and provide rare opportunities in which to study the morphology and environmental conditions for the formation of a modern occurrence of one of the earliest life forms on earth (Yorke Peninsula Heritage Survey, 1997)
(Validated 22 February 2000)
STATEMENT OF GEOLOGICAL SIGNIFICANCE
The Inneston Lake and Deep Lake Geological Sites, Dhilba Guuranda-Innes National Park are the result of thousands of years of hydrological and geological change. There are abundant gypsum deposits at both Inneston Lake and Deep Lake, with those at Deep Lake remaining highly intact. The precipitated minerals in the base of the lakes illustrate recent sea level changes and sediment depositions that ofcontributed to the geological fabric of the place as well as the formation of rare living stromatolites.
Groundwater movement fills Inneston Lake and Deep Lake through springmounds and fissures, while boxwork gypsum texture at Inneston Lake contributes to the ecosystem of the place. The many geological features associated with the carbonates at both lakes demonstrate the continuing development of the geological landscape and yield opportunities to research the geological history of the Yorke Peninsula coast. |
| Subject Index |
Landscape area - Geological Site; Landscape area - Palaeontological Site |
| Class |
State |
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|
| STATUS |
| Status Code |
REG - Confirmed as a State Heritage Place in the SA Heritage Register |
| Status Date |
08-JUL-1999 |
| REFERENCE |
| LGA |
Yorke Peninsula |
| State Heritage ID |
16678 |
| Heritage Number |
16061 |
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| SECTION 16 INFORMATION |
| Section 16 |
b - it has rare, uncommon or endangered qualities that are of cultural significance
c - it may yield information that will contribute to an understanding of the State's history, including its natural history
|
| PLAN PARCEL & TITLE |
| As listed in the SA Heritage Register |
| Plan Parcel & Title Information |
CR 6240/20 H131500 S101; 131 |