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Objective Questions & Answers for APSC Geology Examination | GkSeries
(16) If igneous rocks are unconformably overlain by younger sedimentary rocks, the resulting unconformity is known as
1 disconformity
2 non-conformity
3 angular unconformity
4 offlap
Answer: non-conformity
(17) A limited area of older rocks surrounded by younger rocks is called
1 outlier
2 overlap
3 inlier
4 offlap
Answer: inlier

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(18) Very closely spaced joints in rocks is known as
1 fracture cleavage
2 shear cleavage
3 strain-slip cleavage
4 crenulation cleavage
Answer: fracture cleavage
(19) When stream valleys are guided by folds and are parallel to the trend of fold axes, the pattern of drainage is called
1 dendritic
2 radial
3 trellis
4 annular
Answer: trellis
(20) In an asymmetrical fold, the axis
1 coincides with the crest of an anticline
2 coincides with the trough of the syncline
3 does not coincide with the crest of an anticline
4 coincides with both the trough and the crest of an anticline
Answer: does not coincide with the crest of an anticline
(21) Which one of the following is not a microfossil?
1 Radiolaria
2 Diatom
3 Cyprea
4 Coccolithophore

Answer: Cyprea
(22) A well-known gastropod shell having sinistral coiling is
1 Oliva
2 Physa
3 Nerita
4 Conus

Answer: Physa
(23) Pedicle opening is present in
1 cephalopod shell
2 brachiopod shell
3 gastropod shell
4 bivalved shell

Answer: brachiopod shell
(24) Cardinal teeth in Lamellibranchia is situated at which place?
1 Below the beak
2 At the ligament
3 Away from the beak
4 Cardinal teeth were not present

Answer: Below the beak
(25) Orthis is a genus of
1 Cephalopoda
2 Gastropoda
3 Trilobita
4 Brachiopoda

Answer: Brachiopoda
(26) _____________ surrounds the mouth in Echinoidea.
1 Periproct
2 Madreporite
3 Ambulacrum
4 Peristome

Answer: Periproct
(27) The toothless form of dentition of Lamellibranchia is known as
1 isodont
2 taxodont
3 schizodont
4 edentulous

Answer: edentulous
(28) ____________possesses monomyarian type of adductor muscle.
1 Lucina
2 Unio
3 Area
4 Exogyra

Answer: Exogyra
(29) The bivalvia shells are joined together at the dorsal side by
1 adductor muscle
2 hinge plate
3 ligament
4 delthyrium

Answer: ligament
(30) Which of the following is arranged properly based on the evolution of suture lines in Ammonoidea?
1 Ammonitic, Goniatitic, Ceratitic
2 Goniatitic, Ceratitic, Ammonitic
3 Ceratitic, Ammonitic, Goniatitic
4 Ammonitic, Ceratitic Goniatitic

Answer: Goniatitic, Ceratitic, Ammonitic

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