List of top Geology Questions

Moon is considered to have been formed due to high temperature condensation of post-collisional ejected material. Which of the following statement(s) related to its mantle composition as compared to CI carbonaceous chondrite is/are CORRECT?
Radiogenic atoms of \(^{40}K\) have a half-life of \(1.25 \times 10^9\) years. The percentage of \(^{40}K\) atoms left after six half-lives will be .............. (Round off to two decimal places)
A metapelite is composed of muscovite + quartz + K-feldspar + kyanite mineral assemblage. If the muscovite and K-feldspar show solid solution between 'Na' and 'K' end-members, the minimum number of components that defines this metapelitic assemblage is ............. (In integer)
Which of the following landforms is/are weathering dominated?
The mineral formula of orthopyroxene calculated on 6 Oxygen atom basis is (Mg1.2Fe0.8)Si2O6. The weight percentage of MgO in the chemical composition of orthopyroxene is ............. (Round off to one decimal place)
Which of the following statement(s) related to ore-forming processes is/are CORRECT?
Which of the following property/properties of a mineral indicate(s) uniaxial negative optic sign?
Which of the following is/are characteristic feature(s) of Brachiopods?
Which of the following characteristics of fossils is/are necessary for biostratigraphic applications?
Which of following combinations of sedimentary environments and their features is/are CORRECTLY matched?
Which of the following statements related to stratigraphy is/are CORRECT?
Which one of the following is a Paleozoic flora?
Which one of the following lithospheric plates has the least length of convergent boundary?
Which one of the following set of landforms results dominantly due to erosion?
Which one of the following elements in the Earth is a chalcophile and shows siderophilic behavior?
Which one of the following sedimentary structures is formed by rapid release of water?
Which one of the following is related to porphyry Cu-Mo deposit?
Which one of the following statements is CORRECT for coal?
Which one of the following represents the CORRECT combination of stratigraphic unit with its corresponding age?
Which one of the following is the oldest volcanics?
Match the symmetry elements in Group I with the corresponding crystal system in Group II. \begin{tabular}{|c|c|} \hline Group I & Group II
\hline P. 3A2, 3m, 4A3+i & 1. Orthorhombic
Q. i, 1A4, m & 2. Hexagonal
R. i, 3A2, 3m & 3. Tetragonal
S. 1A3+m, 3m, 3A2 & 4. Cubic
\hline \end{tabular}
A mineral displays magenta interference colour (retardation, \( \Delta m = 550 \, \text{nm} \)) under crossed polarized light. If an accessory plate adds retardation of 100 nm, the interference colour observed is:
Which one of the following characteristic mineral assemblages represents eclogite facies metamorphism of a pelitic protolith?
Which one of the following drainage patterns is formed by stream paths that follow circular segments?
According to Dunham’s classification, which one of the following limestones is grain-supported and contains mud?