Line 130: |
Line 130: |
| {| class = "wikitable" | | {| class = "wikitable" |
| |- | | |- |
− | ! This class of compound … | + | ! This class of compound … || May indicate an origin of … |
− | ! May indicate an origin of …
| |
| |- | | |- |
− | | C<sub>27</sub> steranes | + | | C<sub>27</sub> steranes || Marine organisms (minor amounts occur in nonmarine organisms) |
− | | Marine organisms (minor amounts occur in nonmarine organisms) | |
| |- | | |- |
− | | C<sub>29</sub> steranes | + | | C<sub>29</sub> steranes || Marine or nonmarine organic matter |
− | | Marine or nonmarine organic matter | |
| |- | | |- |
− | | C<sub>30</sub> steranes | + | | C<sub>30</sub> steranes || Marine or lacustrine organisms |
− | | Marine or lacustrine organisms | |
| |- | | |- |
− | | Diasteranes | + | | Diasteranes || Clastic environment |
− | | Clastic environment | |
| |- | | |- |
− | | Hopanes | + | | Hopanes || Bacteria |
− | | Bacteria | |
| |- | | |- |
− | | Gammacerane | + | | Gammacerane || Abnormal salinites |
− | | Abnormal salinites | |
| |- | | |- |
− | | Oleanane | + | | Oleanane || Late Cretaceous or Tertiary terrestrial flowering plants |
− | | Late Cretaceous or Tertiary terrestrial flowering plants | |
| |- | | |- |
− | | Bicadinanes | + | | Bicadinanes || Tertiary terrestrial plants |
− | | Tertiary terrestrial plants | |
| |- | | |- |
− | | C<sub>z</sub> and C<sub>x</sub> triterpanes | + | | C<sub>z</sub> and C<sub>x</sub> triterpanes || Terrestrial organic matter or environment |
− | | Terrestrial organic matter or environment | |
| |- | | |- |
− | | 28,30-bisnorhopane | + | | 28,30-bisnorhopane || Microbes |
− | | Microbes | |
| |- | | |- |
− | | Tricyclic terpanes | + | | Tricyclic terpanes || Bacteria or ''Tasmanites'' |
− | | Bacteria or ''Tasmanites'' | |
| |- | | |- |
− | | Diterpanes | + | | Diterpanes || Terrestrial resins or microbes |
− | | Terrestrial resins or microbes | |
| |- | | |- |
− | | Sesquiterpanes | + | | Sesquiterpanes || Terrestrial plant resins |
− | | Terrestrial plant resins | |
| |- | | |- |
− | | Carotanes | + | | Carotanes || Anoxic marine or lacustrine environment |
− | | Anoxic marine or lacustrine environment | |
| |} | | |} |
| | | |