UPSC Geography The origin and evolution of the earth Question Bank Universe / Sun / Planets / Earth

  • question_answer Match List-I with List-II and select the correct answer from the codes given below:
    List-I (Era) List-II (Epoch)
    A. Palaeozoic 1. Jurassic
    B. Mesozoic 2. Archean
    C. Pre Cambrian 3. Oligocene
    D. Cainozoic 4. Silurian

    A)             A-1       B-4       C-2       D-3

    B)             A-4       B-1       C-2       D-3

    C)             A-1       B-4       C-3       D-2

    D)             A-4       B-1       C-3       D-2

    Correct Answer: B

    Solution :

     Palaeozoic - Silurian (The Silurian is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at 443.8 million years ago (Mya), to the beginning of the Devonian Period, 419.2 Mya. As with other geologic periods the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by several million years. The base of the Silurian is set at a major Ordovician-Silurian extinction event when 60% of marine species were wiped out. Mesozoic - Jurassic (The dinosaurs went extinct 65 million years ago. The Mesozoic Era lasted about 180 million years, and is divided into three periods, the Triassic, the Jurassic, and the Cretaceous. Each of these periods is divided into many epochs and ages. Mesozoic means Middle Animal" and is sometimes called the age of reptiles.) Pro Cambrian - Archean (The Precambrian (or Pre- Cambrian, sometimes abbreviated p?) is the earliest period of Earth's history, set before the current Phanerozoic Eon. The Precambrian (colored green on the right) is a super eon that is subdivided into three eons (Hadean, Archean, Proterozoic) of the geologic time scale.)  Cainozoic - Oligocene (The Cainozoic (Cenozoic) is the current geological era. It began 66 million years ago and continues today. Before it was the Mesozoic. During the Cainozoic the continents moved into their present positions.)


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