Conodonts are an extinct group of microscopic fossils that are significant in microfossil history. They are composed of calcium phosphate and resemble eel-like creatures. Conodonts first appeared in the Late Cambrian period and became extinct in the Late Triassic. They are useful for correlating strata and determining environmental factors like climate and water depth due to their abundance and wide geographic range during the Paleozoic era. Their tooth-like elements are prepared and studied using acid treatment and microscopy. Conodonts have been important for biostratigraphy and tracing evolutionary relationships.
Microfossils are very small remains of organisms 0.001 mm (1 micron) to 1 mm, that require magnification for study.
They are abundant, can be recovered from small samples.
Provide the main evidence for organic evolution through the time
They classified into two groups:
Organic-walled; Acritarchs, Dinoflagellate, Spores and Pollen grains … etc.
Foraminifera Each chamber interconnected by an opening (foramen) or several openings (foramina).
Known from Early Cambrian through to recent times, and has reached its acme during the Cenozoic.
Have a wide environmental range from terrestrial to deep sea and from polar to the tropical region.
Depending on the species, the shell may be made of organic compounds, sand grains and other particles cemented together, or from crystalline calcite.
Inorganic walled; Diatoms, Silicoflagellates, Ostracods, Conodonts, and Foraminifera
Microfossils are very small remains of organisms 0.001 mm (1 micron) to 1 mm, that require magnification for study.
They are abundant, can be recovered from small samples.
Provide the main evidence for organic evolution through the time
They classified into two groups:
Organic-walled; Acritarchs, Dinoflagellate, Spores and Pollen grains … etc.
Foraminifera Each chamber interconnected by an opening (foramen) or several openings (foramina).
Known from Early Cambrian through to recent times, and has reached its acme during the Cenozoic.
Have a wide environmental range from terrestrial to deep sea and from polar to the tropical region.
Depending on the species, the shell may be made of organic compounds, sand grains and other particles cemented together, or from crystalline calcite.
Inorganic walled; Diatoms, Silicoflagellates, Ostracods, Conodonts, and Foraminifera
Brief description on Phylum Brachiopods with general terms used for Paleontology.
Structure paleoecology, geography, morphology.
And also easily understandable as since it discuss only specific terms only.
Ichnology,classification & significance of trace fossilUjjavalPatel16
Ichnology,classification& significance of trace fossil
Most trace fossils are largely facies dependant.
No secondary displacement or transport.
Trace fossils are common in rocks that otherwise are unfossiliferous. (siliciclastics, shorelines)
Non-preservation of the causative organism.
Multiple architects may produce a single structure.
The same individual can produce different structures corresponding to different behavior.
The same individual may produce different structures corresponding with identical behavior but in different substrates.
Identical structures may be produced by the activity of systematically different organisms where behavior is similar.
Abundance - one animal, especially if mobile, can make many traces during its lifetime, whereas it may or may not have its body preserved in the fossil record.
Graptolites is an important index fossil for Paleozoic rocks and common throughout the world. As in Pakistan the sequences from the Ordovician to carboniferous age missing but these strata are exist in Noshehra and Chitral, so thats why its more valuable as regional fossil of sub-continent.
Microfossils and their Applications in petroleum Industry Sachin Yadav
It's a class presentation at Dept. Of Earth Sciences IIT bombay. I have included main type of the Microfossils and their index feature and applications.
Trilobites are extinct group in fossil record TimeMarkers
Biozone markers
Paleoclimatic indicators Stratigraphic boundarymarkers Significance in Phylogenic studies
Good time markers in Cambrian-Permianas
Index fossils
Short lived but long and significant markers in Stratigraphic studies.
MORPHOLOGY AND SIGNIFICANCE OF CONODONT (group-D).pptxKuki Boruah
Conodonts are marine organism ranging from Cambrian to Triassic periods, having a long wormlike body, numerous small teeth and a pair of eyes.
It is now believed as the earliest vertebrate and now it is an extinct group of organism.
First identified by the LATVIAN embryologist and palaeontologist Christian Pander in 1856.
Conodonts are most frequently occuring fossil in marine Sedimentary Rocks.
Size of Conodonts commonly in between 200 microns and 5 millimetres.
The preserved color varying from translucent and colorless through light brown to black.
Brief description on Phylum Brachiopods with general terms used for Paleontology.
Structure paleoecology, geography, morphology.
And also easily understandable as since it discuss only specific terms only.
Ichnology,classification & significance of trace fossilUjjavalPatel16
Ichnology,classification& significance of trace fossil
Most trace fossils are largely facies dependant.
No secondary displacement or transport.
Trace fossils are common in rocks that otherwise are unfossiliferous. (siliciclastics, shorelines)
Non-preservation of the causative organism.
Multiple architects may produce a single structure.
The same individual can produce different structures corresponding to different behavior.
The same individual may produce different structures corresponding with identical behavior but in different substrates.
Identical structures may be produced by the activity of systematically different organisms where behavior is similar.
Abundance - one animal, especially if mobile, can make many traces during its lifetime, whereas it may or may not have its body preserved in the fossil record.
Graptolites is an important index fossil for Paleozoic rocks and common throughout the world. As in Pakistan the sequences from the Ordovician to carboniferous age missing but these strata are exist in Noshehra and Chitral, so thats why its more valuable as regional fossil of sub-continent.
Microfossils and their Applications in petroleum Industry Sachin Yadav
It's a class presentation at Dept. Of Earth Sciences IIT bombay. I have included main type of the Microfossils and their index feature and applications.
Trilobites are extinct group in fossil record TimeMarkers
Biozone markers
Paleoclimatic indicators Stratigraphic boundarymarkers Significance in Phylogenic studies
Good time markers in Cambrian-Permianas
Index fossils
Short lived but long and significant markers in Stratigraphic studies.
MORPHOLOGY AND SIGNIFICANCE OF CONODONT (group-D).pptxKuki Boruah
Conodonts are marine organism ranging from Cambrian to Triassic periods, having a long wormlike body, numerous small teeth and a pair of eyes.
It is now believed as the earliest vertebrate and now it is an extinct group of organism.
First identified by the LATVIAN embryologist and palaeontologist Christian Pander in 1856.
Conodonts are most frequently occuring fossil in marine Sedimentary Rocks.
Size of Conodonts commonly in between 200 microns and 5 millimetres.
The preserved color varying from translucent and colorless through light brown to black.
Phylum Mollusca, Class Polyplacophora, Class Monoplacophora, Phylogenetic con...Dr. Muhammad Moosa
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Palynomorphs are acid resistant organic walled microfossils, ranging in size from 1micron to 1mm. They preserved in unoxidized, fine-grained sediments, primarily dark-colored. Palynomorphs rich rocks may contain millions of species per gram.
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19) Sample O. Arthropods (insects, spiders, crabs, and others) are the most diverse group of animals on the planet today. They have a distinctive exoskeleton and segmented bodies. Their exoskeletons are composed of chiton, which is an organic material rather than a mineral (protein). How would a skeleton made of protein alter their chance to become a fossil? Examine these examples of fossil trilobites, which are an extinct group of marine arthropods. They are common fossils in ancient rocks compared to other arthropods. Why might that be?
20) Sample P. These are examples of fossil echinoderms (sea stars, sea urchins, and relatives). Echinoderms have an internal skeleton, a variation on 5-fold symmetry, and a water vascular system with tube feet (used for locomotion and feeding). P1: These are examples of crinoids (feather stars or sea lilies). These animals are often confused with plants, but they are animals that filter the sea water with delicate arms. Think of them as a starfish atop a long stem. Crinoids were extremely abundant in the past, but are rare in the ocean today. Their stems could range in length from a few inches to over 100 feet! Why might a long stem benefit a filter feeding marine organism? P2: These are two examples of fossil echinoids, including sea urchin and a sea biscuit. Examine the sea urchin and notice it is covered with bumps wher.
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Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda. The members are known as molluscs or mollusks. Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species
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2. INTRODUCTION TO FOSSILS
CLASSIFICATION OF FOSSILS
MICROFOSSIL AND ITS CLASSIFICATION
SIGNIFICANCE OF CONODONTS IN MICROFOSSIL
HISTORY
TECHNIQUES
HISTORY OF STUDY
RANGE-TIME MARKERS
APPLICATIONS
CLASSIFICATION
CONCLUSION
REFERENCES
216/11/2012
3. The term fossil is derived from a old latin word
fossils meaning ‘something dug up’Fossils are
the preserved remains or traces of animals
(also known as zoolites), plants, and other
organisms from the remote past..
This word introduced by G.Agricola.Orginally
refered to any subject that was dug out of the
earth surface.
316/11/2012
4. BROADLY
Macrofossil - Animal-Vertebrate, Invertebrate,
Plant
Microfossil - Groups
Types
Extinct
Index
Synthetic
Persistence
Pseudo fossils
416/11/2012
5. 5
Earth Surface ¼ covered
by
OOZE
Nothing but
Organic
Materials
Like
Microshells
16/11/2012
6. Microfossils are tiny remains of
bacteria,protists,fungi,plant &animals.
Microfossils are a heterogeneous bunch of fossil remains
studies as a single discipline because rock samples must be
processed in certain way to remove them and microscope
are must be used to study them.
Thus, microfossils, unlike other kinds of fossils, are not
grouped according to their relationships to one another,
but only because of their generally small size and methods
of study.
616/11/2012
7. The main source of these microfossils are the Carbonate rocks like
Dolomite and limestone, Fine grained sandstone,Blackshales,Coal.
Some times reworked metasediment samples also bear microfossils.
The study of these microfossils provides the main evidence for
organic evolution, biostratigraphic indication, defection of oil
bearing deposits.
These microfossils can be classified depending upon their chemical
composition of test or shell. It is mainly divided into
Organic walled
Inorganic walled
716/11/2012
8. An organic walled fossil covers spores-pollens,
Acritarchs, chitinozoans ,dinoflagellates.
Inorganic walled may be calcareous, siliceous, chitinous,
phosphatic,carbonaceous.
Calcareous –Foraminifera
Silicious –Ostrocoda
Chitinous-Chitinozoa
Phosphatic-Conodont.
8
Contd...
16/11/2012
9. Calcareous Micro fossils
Calcareous microfossils where test (wall) made up of CaCO3
.eg: Foraminifera
Siliceous Micro fossils
Siliceous Micro fossils those shell and walls made up of silica
eg: Radiolarian
Chitinous Micro fossils
It is made up of Chitinous material. They called as Chitinozoa.
Phosphatic Micro fossils
The test of phosphatic microfossils made up of Phosphatic
material eg: Conodonts - tooth like cone like
9
Contd...
16/11/2012
11. Conodonts are extinct chordates resembling
eels, classified in the class Conodonta. For
many years, they were known only from
tooth-like microfossils now called conodont
elements.
The animals are also called Conodontophora
(conodont bearers) to avoid ambiguity.
1116/11/2012
15. Conodonts can be used to help correlate areas of time in
the Paleozoic.
Conodonts elements can be used to figure out the climate
changes in the Paleozoic.
Water depth or distance from shore.
Global rises and falls in sea level.
The great abundance helps with understanding the
evolutionary relationships.
Understanding geochemical characteristics of Paleozoic
oceans.
1516/11/2012
16. Preparation Techniques
Since conodonts are resistant to mechanical and chemical attack
preparation techniques can utilise acids such as acetic, formic, or
monochloric to release the elements from their host rocks, which are
commonly carbonates. Conodonts are commonly between 200 microns
and 5 millimetres in size and can be sieved from finer materials and
further concentrated by heavy liquid or ultrasonic techniques.
Observation Techniques
The cleaned specimens can then be viewed using a reflected light
microscope and manipulated and mounted in slides in the same manner
as foraminifera. Conodonts can also be observed in thin sections.
1616/11/2012
17. The name "conodont" was coined by C.H. Pander (a Russian)
in 1856, who worked on Silurian fish fossils of Eastern
Europe.
Ulrich and Bassler (1926) described many new species from
North America and were the first to recognise their
biostratigraphic usefulness.
In 1934 Schmidt and Scott discovered groups of individual
elements preserved together on the same bedding plain.
This importantly led to the theory that the individual
elements were in life held in pairs (termed an apparatus)
often likened to mouth parts. From the 1960's onwards
conodonts have developed into one of the most important
biostratigraphic tools available in Palaeozoic and Triassic
rocks. 1716/11/2012
18. The very earliest conodonts are known from rocks of probable
Precambrian age in Siberia, they are found more commonly in Cambrian
deposits, diversity increased in the Ordovician and again during the
Devonian.
The conodont-bearing organism clearly survived the Permo-Triassic
boundary extinctions but became extinct during the late Triassic.
It has been noted that the extinction of the conodonts coincides with the
diversification of dinoflagellates and first appearance of calcareous
nannofosils.
The most primitive conodonts are single cones, which dominate early
Ordovician assemblages and reach a peak in the Arenigian (late Early
Ordovician).
The first platform type conodonts occur around this time as well.
Conodont diversity and abundance declined in the Silurian.
In the Permian the conodonts almost became extinct, however, they made a
recovery in the early to middle Triassic only to disappear in the late Triassic. 1816/11/2012
19. The fact that conodonts are relatively common in rocks of
Palaeozoic age, a period when other microfossil groups are
either not present or scarce, has made them extremely
useful stratigraphic tools.
Together with acritarchs, chitinozoa and spores,
conodonts are the primary microfossils available to
palaeontologists working on Ordovician to Permo-Triassic
strata.
1916/11/2012
20. Conodonts have been assigned to their own Phylum, Conodonta, divided
into two Orders based on chemical and ultrastructure differences.
One hundred and eighty genera have been recognised. It must be
remembered that any classification of conodonts is an un-natural one, as it
is based on morphology only.
Morphologically, four main groups of
conodonts can be distinguished.
Simple cones: formed by a single tooth, or denticle.
Blade-type: elongate, laterally compressed units formed by a row of denticles which are
fused except at their tips.
Bar-type: thin bars with or without a bent shaft which is commonly branched.
Platform: it is thought these forms evolved from bar and blade-type conodonts by the
developement of broad flanges into plates.
2016/11/2012
21. Conodonts are type of micro fossil fore runner for first aquatic
vertebrates. Phylogenicaly very important group
Conodonts are extinct chordates resembling eels, classified in the
class Conodonta.
Short lived but time markers in Stratigraphy
First appearance in Tremadoc (Late Cambrian- Early Ordovician)
The name "conodont" was coined by C.H. Pander (a Russian) in 1856
Like Mineralogical / Geological / Paleontological societies in Canada
Pander Society is for Conodont Research.
2116/11/2012
22. o M.D.Brasier- Microfossils -1981, Page No:147-148.
o Anne Boersma-Introduction to marine micropalaeontology-
1978, Page No:341-356
Websites:
http://en.wikipedia.org/wiki/Conodont
http://www.bioone.org/doi/abs/10.1666/0022-
3360%282001%29075%3C1174%3ACPPF%3E2.0.CO%3B2
http://en.wikipedia.org/wiki/Portal:Paleontology
2216/11/2012