Which of the following microfossils is commonly used in biostratigraphic correlation of Palaeozoic marine strata ?
Chitinozoans
A microfossil is useful for biostratigraphic correlation when it evolved rapidly, was widespread in marine waters and occurs in the time interval of interest. For Palaeozoic marine strata, organic-walled groups such as chitinozoans, acritarchs and graptolites are the standard tools.
Chitinozoans are flask-shaped, organic-walled microfossils of uncertain affinity, known from the Ordovician to the Devonian. They are abundant in marine shales, survive thermal maturation reasonably well, and their short-ranging species allow detailed zonation of Ordovician, Silurian and Devonian marine successions worldwide.
Angiosperm pollen first appears in the Early Cretaceous, so it is absent from Palaeozoic rocks. Diatoms are known reliably only from the Jurassic or Cretaceous onwards, and dinoflagellate cysts become useful from the Triassic and especially the Jurassic onwards; none of these can correlate Palaeozoic marine beds.
Chitinozoans option is correct.
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Important Questions from Mixed Topic (MH-SET)
.................... is a client server application that identifies each host on the internet with a unique user-friendly name.
Every OS has a ................ or .......... which primarily resides in the main memory of the computer to perform some of the basic functions of the OS.
(i) Kernel
(ii) Interface
(iii) Nucleus
(iv) Compiler
Codes:
Which of the following are referred to as low level language?
(i) Machine language
(ii) Assembly language
(iii) High level language
(iv) Natural language
Codes:
Match the following:
List I List II (a) New York Public Library (i) Shelv AR (b) Miami University Augmented Research Group (ii) Smart library (c) Oula University Library (iii) Wolf Walk (d) North Carolina State University (iv) Find the future Codes:
Which part of the QR code represents the encoded data?
