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Stromatolites Division
Stromatolites
are layered accretionary
structures
formed in shallow water by the trapping, binding, and cementation of sedimentary
grains by
biofilms of
microorganisms,
especially
cyanobacteria
(commonly known as blue-green
algae).
While Cyanobacteria have been traditionally included among the algae,
referred to as the Cyanophytes or blue-green algae, recent works on algae
usually exclude them due to large differences such as the lack of membrane-bound
organelles, the presence of a single circular chromosome, the presence of
peptidoglycan in the cell walls, and ribosomes different in size and content
from eukaryotes. Rather than in chloroplasts, they conduct photosynthesis on
specialized infolded cytoplasmic membranes called thylakoid membranes.
Therefore, they differ significantly from the algae despite occupying similar
ecological niches.
Image Code F85 |
Catalogue No.: F85
Description: Stromatolites. Alice
Springs, Australia.
Size: 225 x 220mm. |
Image Code F492 |
Catalogue No.: F492
Description: 'The Brain'
Stromatolite. Cotham Marble, Triassic Period, Bristol, U.K.
Cotham Marble is a limestone,
rather than a true marble. Its ‘landscape’ has been shown to have been
produced by the growth of algae and worm-like organisms on ancient
mud-flats. The algal mats bound the lime-rich sediment in layers (‘ploughed
fields’), the surface of which developed polygonal ridges and tufts that
became colonised by worm-like creatures. This particular specimen is a
manificent looking Stromatolite that has a surface appearance highly
suggestive of a brain. It is mounted in a purpose built display module (not
shown) under a perspex dome.
Stromatolites are rock-like
buildups of microbial mats that form in limestone forming environments.
Stromatolite-building communities include the oldest known fossils, dating
back some 3.5 billion years when the environments of Earth were too hostile
to support life as we know it today.
Size: 490 x 500mm. |
Image Code F3976 |
Catalogue No.: F3976
Description: Stromatolites.
Size: 300X210mm. |
Image Code F3977 |
Catalogue No.: F3977
Description: Stromatolites.
Size: 290X220mm. |
Image Code F3978 |
Catalogue No.: F3978
Description: Stromatolites.
Size: 320X250mm. |
Image Code F3979 |
Catalogue No.: F3979
Description: Stromatolites.
Size: 290X220mm. |
Image Code F3980 |
Catalogue No.: F3980
Description: Stromatolites.
Size: 325X220mm. |
Image Code F3981 |
Catalogue No.: F3981
Description: Stromatolites.
Size: 390X195mm. |
Image Code F3982 |
Catalogue No.: F3982
Description: Stromatolites.
Size: 260X230mm. |
Image Code F3983 |
Catalogue No.: F3983
Description: Stromatolites.
Size: 240X180mm. |
Image Code F3986 |
Catalogue No.: F3986
Description: Stromatolites.
Size: 235X200mm. |
Image Code F3991 |
Catalogue No.: F3991
Description:
Stromatolites.
Size: 110X82mm. |
Image Code F3992 |
Catalogue No.: F3992
Description:
Stromatolites.
Size: 102X78mm. |
Image Code F3993 |
Catalogue No.: F3993
Description: Stromatolites.
Size: 198X124mm. |
Image Code F3994 |
Catalogue No.: F3994
Description: Stromatolites. Precambrian. Lake
Uguyi, Bolivia.
Size: 142X108mm. |
Image Code F3995 |
Catalogue No.: F3995
Description: Stromatolites.
Precambrian.
Lake Uguyi, Bolivia.
Size: 124X114mm. |
Image Code F3996 |
Catalogue No.: F3996
Description: Stromatolites.
Size: 59X86mm. |
Image Code F3997 |
Catalogue No.: F3997
Description: Stromatolites. Cretaceous. S-Erfoud, Morocco.
Size: 159X106mm. |
Image Code F3998 |
Catalogue No.: F3998
Description: Stromatolites
- sliced. Alice
Springs, Australia.
Size: 114X60mm. |
Image Code F3999 |
Catalogue No.: F3999
Description: Stromatolites.
Size: 113X106mm. |
Image Code F4000 |
Catalogue No.: F4000
Description: Stromatolites.
Size: 179X116mm. |
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