Biostratigraphy (subset) Mesozoic Cenozoic
Links
| Name | Description | Link | |
|---|---|---|---|
| Download ESRI SHP file | Download ESRI SHP file | ||
| Download Google Earth KMZ file | Download Google Earth KMZ file | ||
| Download ESRI Geodatabase file | Download ESRI Geodatabase file | ||
| Download MapInfo TAB file | Download MapInfo TAB file |
About this record
| Record No | mesac888 |
|---|---|
| Topic | Geoscientific Information |
| Type of Resource | Dataset |
| Category Type | Earth Sciences |
| Document Type | |
| Contributor | |
| Sponsor | |
| Tenement | |
| Tenement Holder | |
| Operator | |
| Geological Province | |
| Other | |
| Mine Name | |
| Stratigraphy | |
| Commodity | |
| Notes | |
| Language | English |
| Metadata Standard | ISO 19115-3 |
| Use constraints | License |
|---|---|
| License | Creative Commons Attribution 4.0 |
| Persistent identifier | https://pid.sarig.sa.gov.au/dataset/mesac888 |
| Citation | Biostratigraphy (subset) Mesozoic Cenozoic https://pid.sarig.sa.gov.au/dataset/mesac888 |
| Status | Completed |
|---|---|
| Maintenance and Update Frequency | |
| Geographic Reference | GDA2020 (EPSG:7844) |
| Geo bounding box | {"type":"Polygon","coordinates":[[[129,-38],[141,-38],[141,-26],[129,-26],[129,-38]]]} |
| Purpose |
To display the Biostratigraphy within South Australia's palaeodrainage systems. To display the Biostratigraphy within South Australia's palaeodrainage systems. |
| Lineage |
Source data: SA_Geodata, raw open file data of palynological and foraminifera analysis and dating in Geological Survey of South Australia, Report Books, Other Publications, Historical data. Accuracy variable, dependent in part on scale and... Source data: SA_Geodata, raw open file data of palynological and foraminifera analysis and dating in Geological Survey of South Australia, Report Books, Other Publications, Historical data. Accuracy variable, dependent in part on scale and quality of source data. As dataset is partly interpretive, positional accuracy and boundaries are subject to alternative interpretation. Geological attributes are based on interpretation of features in the subsurface which are not directly observable; thus they are subject to alternative interpretations. Biostratigraphy is a branch of stratigraphy that uses fossils to establish relative ages of rock samples and correlate successions of sedimentary rocks within and between the basins. Palynology is the science that studies modern and fossil palynomorphs (pollen, spores, dinoflagellate cysts, acritarchs, plant cuticles, phytoliths), organic matter and kerogen found in sedimentary rocks and sediments. Here Palynology is also associated with analysis type. Geological range is from Precambrian to present day. Their size range from 5 microns to 200-500 microns. Foraminifera are calcareous single-celled marine organisms (microfossils), divided into planktonic and benthonic species. Many species have perforated walls. They have a geological range from Cambrian to present day. Here foraminifera is used as an analysis type. Foraminifera range in size from several millimeters to few tens of microns. Biostrat zones (a biozone) is an interval of geologic strata characterised by certain fossil taxa. The intervals are based on the first and last appearance of fossil index species (or key taxa). Biostratigraphy zones are divided into pollen-spores zones, dinoflagellate cysts zones and foraminifera zones. The biostratigraphy zones can be calibrated against absolute geological timescale if rock samples can be radio-isotopically dated. Note that biostratigraphy zones don not exactly overlap the geological timescale. There are also geological time intervals with no biostratigraphy zones developed yet (lack of data and/of fossils were not preserved). |
Attribute details
| Name | Definition |
|---|---|
| SM LIBRARY | Sample Library |
| REFERENCES | References of the interpretation |
| SITE NO | Unique number generated by SA Geodata for every record captured which contains coordinates and can be plotted on the map. Site number is identical for all rock samples linked with the same drillhole. Each outcrop sample has a different site |
| MGA East | MGA Easting |
| MGA North | MGA Northing |
| MGA zone | MGA zone |
| LONG DEG | Longitude Degrees Real |
| NEGLAT DEG | Negative Latitude Degrees Real |
| SAMPLE NO | Rock Sample No: Unique number generated by SA Geodata for every rock sample captured |
| ANALYSIS T | Analysis Type. Two analysis types are provided for Biostratigraphy layer. |
| ANALYSIS N | Analysis Number. Number generated by the laboratory for the rock samples processed for palynology and formaminifera analysis and dating. |
| ANALYSIS | Name of geoscientist who analysed the sample and interpreted the results. |
| ANALYSIS D | Analysis date |
| DH NUMBER | Drillhole Number. Unique number generated by SA Geodata for each drillhole captured. |
| DH NAME | Drillhole name |
| DEPTH FROM | Depth from |
| DEPTH TO | Depth to |
| SM SOURCE | Sample source |
| SM COLLECT | Sample collected by. For historical samples when the name of the person/company is not known |
| COMPANY | Company name. When the name is too long |
| COLL DATE | Collected date. Date when rock samples were collected. |
| LITHOLOGY | Lithology |
| LITHO DESC | Lithology description |
| ROCK GROUP | Rock Group |
| BIO OLDAGE | Biostrat Oldest Age |
| BIO OLD CF | Biostrat Oldest Age Confidence. Using ? when assigning the age if no sufficient evidence is provided in the analysed samples (usually key age taxa are not present or yield is poor). |
| BIO YNGAGE | Biostrat Youngest Age |
| BIO YNG CF | Biostrat Youngest Age Confidence. Using ? when assigning the age if no sufficient evidence is provided in the analysed samples (usually key age taxa are not present or yield is poor). |
| BARREN | Barren samples. Have indicators 'Y' = Yes and 'N = No. |
| BI OLDZONE | Biostrat Oldest Zone. Biozone is named after the nominate taxon based on the oldest range of that taxon (lowest stratigraphic occurrence in the analysed sample. Biozone could be named after a key taxon or using an alphanumeric codes. |
| BI YNGZONE | Biostrat Youngest Zone. Biozone is named after the nominate taxon based on the youngest range of that taxon (highest stratigraphic occurrence in the analysed sample. Biozone could be named after a key taxon or using an alphanumeric codes. |
| PALAEO ENV | Palaeodepositional Environment. Interpretation undertaken by the analyst of palaeoenvironments using the evidence of marine and non-marine taxa present in the rock samples. value is usually associated with barren samples or when there is not enough information to assign it. |
| PALAEO VEG | Palaeovegetation. Interpretation undertaken by the analyst of palaeovegetation using the evidence and abundance of pollen |
| GEOL PROV | Geological province name |
| MAP SYMBOL | The standard code abbreviation for the stratigraphic unit name |
| STRAT UNIT | Stratigraphic unit name |
| STRAT DESC | Stratigraphic unit description |
| STRAT OAGE | Stratigraphic unit oldest age. Correlation of the stratigraphic unit with the time scales |
| STRAT YAGE | Stratigraphic unit youngest age. Correlation of the stratigraphic unit with the time scales |