Geological fieldwork is one of the most fundamental parts of Geology. This is not only the most effective way to learn geology, but also through which most of the breakthroughs came in the history of geology. Realizing the significance, the Department of Geology of University of Dhaka added Field Geology in the curriculum and every year the students visit a geological site for fieldwork and study it thoroughly. So the students from 49th batch of the department went on a weeklong fieldwork in Sitakund, Chittagong, Bangladesh in January, 2018. This was their first fieldwork and they were led by two highly experienced professors in Field Geology. As the Sitakund area lies in the Indo-Burma Range, a prominent thrust-faulted anticline covers most of the Sitakund area. This fold is widely known as the "Sitakund Anticline". The fault strikes NW-SE and dips eastward. Its eastern flank is thrusted over the western flank. This anticline also created a petroleum trap, which accumulated natural gas over millions of years. And due to the thrust faulting, many gas seepages are found along the faulted region of the anticline. The primary objective of this fieldwork was to create a geological map of Sitakund from the base map. Another goal was to study the structural and geomorphological features, sedimentary structures, lithology of the rocks and also to assess the economic significance of the natural resources of Sitakund. The team of students went to four of the sections in Sitakund and studied outcrops. With the help of their professors, they studied features like joints, fault, drag fold, lenticular bedding, load cast, flute marks, cross lamination, graded bedding, flaser bedding etc. They collected fossil and rock samples for further studies. They also noted the attitude of the beds with compass-clinometer while studying the outcrops. Analyzing the data, they identified the westerly dipping western flank, the eastern flank, the axis of the anticline and overturned beds due to thrusting. Finally they drew a conclusion with the interpretation of collected data. After returning from the fieldwork, the students prepared field reports in groups. The field report cited all of their findings during the fieldwork. They also presented gist of their field reports in front of the teachers. The final assessment was made on their activities during the fieldwork, presentation and field report. As a part of the academic curriculum, this fieldwork helped the students correlate the knowledge of books with the knowledge from observation. This fieldwork enabled them to experience the diversity of geology and inspired them to become influential geologists in the future.

1. PRESENTATION
ON
GEOLOGICAL FIELDWORK
SITAKUND ANTICLINE, CHITTAGONG, BANGLADEH
PRESENTED BY
TEAM AMETRINE
I. MOHAMMAD SOLAIMAN (SH-070-019)
II. MUHAMMAD ARIFUR RAHMAN (SH-070-002)
III. NOUSHIN AKTER TISHA (RH-070-005)
IV. WAHIDATUNNESSA MOHONA (SK-070-006)
V. IQBAL HASAN (SH-070-013)
VI. ASIF ALVE (SH-070-016)
Department Of Geology
University Of Dhaka

2. BRIEF OVERVIEW
• Timeline: 4th January – 9th January, 2018
• Location: Sitakund, Chittagong, Bangladesh
• Base Camp: YPSA Human Resource Development Center
• Number of Studied Sections: 4
Team Leader: Dr. Subrota Kumar Saha
Teachers: Dr. Badrul Imam
Md. Shakhawat Hossain
Md. Yusuf Gazi

3. Sitakund

4. OBJECTIVES
OF
GEOLOGICAL FIELDWORK
✓ Producing the geological map of Sitakund
from the base map
✓ Identifying and analyzing the Sitakund
Anticline
✓ Study the structural, geomorphic,
sedimentary & lithological features of the
Sitakund Hill Range

5. REGIONAL GEOLOGY OF SITAKUND HILL RANGE
Region :
Sitakund Hill Range is one of the most notable hill ranges in
Bangladesh.
❑ 70 km long & 10 km wide.
Location (Base Map):
❑ Latitude : 22⁰34’25”N to 22⁰41’10”N .
❑ Longitude : 91⁰37’50”E to 91⁰43’E
❑ Lies in the North-western part of Chittagong city .
❑ Practically a hilly region .

6. LOCATION MAP OF SITAKUND ANTICLINE

7. AERIAL VIEW OF SITAKUND ANTICLINE
(SATELLITE MAP)
3D View of the Anticline

8. TECTONIC CAUSE FOR THE FORMATION OF
SITAKUND ANTICLINE
❑Collision of Indian plate & Burma
Plate.
❑Uprising of landmass at the
convergent boundary between two
plates.
❑Continuous increase of pressure.
❑Formation of folded regions.
❑Occurrence of fault as a result of
excess pressure buildup.

9. TECTONIC CAUSE OF THE ANTICLINE
Satellite View of The Plates

10. TOPOGRAPHIC MAP OF BANGLADESH

11. TOPOGRAPHIC MAP OF THE ANTICLINE

12. BASE MAP
N
E
S
WBase Map Of
Sitakund
Between
Baraiyadhala
& Barabkund

13. GEOLOGICAL ASPECTS OF
SITAKUND HILL RANGE
➢ Structural Features
➢ Geomorphic Features
➢ Various Sedimentary Structures
➢ Lithology of Rocks
➢ Economic Mineral Deposits &
Resources

14. STUDIED SECTIONS IN THE FIELDWORK
1) Day 1 - Labanakkhya Stream ,
Shahasradhara Waterfall &
Balukhali Stream
2) Day 2 – Baraiyadhala Section &
Chagalkainda Stream
3) Day 3 - Microwave Road-Cut
Section & Chandranath Temple
4) Day 4 - Barabkund Section

15. LABANAKKHYA STREAM
SAHASRADHARA WATERFALL
BALUKHALI STREAM

16. BARAIYADHALA SECTION
CHAGALKAINDA STREAM

17. MICROWAVE ROAD-CUT SECTION
CHANDRANATH TEMPLE

18. BARABKUND SECTION

19. DAY ONE
LABANAKKHYA STREAM
SHAHASRADHARA WATERFALL
BALUKHALI STREAM SECTION

20. LOCATION
❑Latitude: 22⁰39’51” N
❑Longitude: 91⁰38’51” E
❑Number of Station: 9
❑Starting Station: Labanakkhya Stream
❑Ending Station: Balukhali Stream

21. MAGNIFIED SECTION ONE ON THE BASE MAP

22. GEOMORPHIC FEATURES
➢ Stream
➢ Waterfall
➢ Plunge Pool
➢ Rapid
➢ Pothole
➢ Valley

23. STREAM
A streamis a body
of water with a
current confined
within a bed and
banks. There are
hundredsof
streams in
Sitakund.

24. STREAM

25. WATERFALL
A waterfall is a place
where water flows over a
vertical drop or a series of
steep drops in the course
of a stream or river. There
was a waterfall at the
eastern flank named
Shahasradhara Waterfall.

26. PLUNGE POOL
• A plunge pool is a depression
in a stream bed at the base of
a waterfall.
• It is created by the erosional
forces of falling water on the
rocks at fall's base where the
water impacts.
• There we witnessed plunge
pool at the bottom of the
Shasradhara Waterfall.

27. Plunge Pool

28. RAPID
• Rapid is a fast-flowing and turbulent part of the course of a stream.
• They are sections of a stream where the stream bed has a relatively steep slope.
• They are the hydrological features between a smoothly flowing part of a
stream and a cascade.

29. Rapid

30. POTHOLE
• A pothole is a circular or
cylindrical hole in the stream
bed which is produced by force
of water and abrasion.
• A pothole is formed when a
circular current of water
carrying small pebbles and
sediment begins to wear away
a rock surface.
• We have seen potholes in
Balukhali section.

31. POTHOLE IN BALUKHALI STREAM

32. VALLEY
• A valley is a low area between hills, often with a stream
running through it.
• In geology, a valley is a depression that is longer than it is
wide.

33. A VALLEY BETWEEN TWO HILLS

34. STRUCTURAL FEATURE
➢Thrust Fault
➢Joint

35. THRUST FAULT
• A thrust fault is a break in the Earth's crust, across
which younger rocks are pushed above older
rocks.
• This is reverse fault that dip less than 45⁰.
• Hence The hanging wall moves up and over the
footwall.

36. THRUSTFAULTIN SAHASRADHARAWATERFALL

37. JOINT
• Joint is a fracture in rocks along which no
movement has occurred.
• They occur in thick beds of sandstone and shale.

38. Joint in Fissile Shale

39. SEDIMENTARY STRUCTURE
➢ Bedding
➢ Lamination
➢ Lenticular Bedding
➢ Cross Lamination
➢ Concretions
➢ Onion structure
➢ Mud crack
➢ Alternating beds of shale & sandstone

40. Bedding in the Waterfall Outcrop

42. Lamination in Shale

43. Lenticular Bedding of Shale
Source: Wikipedia

44. Concretions
• A concretion is a hard, compact mass of matter formed by the
precipitation of mineral cement within the spaces between
particles, and is found in sedimentary rock or soil.

45. CONCRETIONS

46. BIDIRECTIONAL CROSS LAMINATION

47. Spherical Onion Structure

48. Mud Cracks at the base of stream

49. Shale Sandstone Alternation

50. ROCK LITHOLOGY
➢Silty Shale
➢Fissile Shale
➢Laminated Shale
➢Siltstone
➢Mudstone

51. ROCK PROPERTIES
Shasradhara Waterfall
• There most of the rocks are silty clay which are composed of
silt and clay.
• They are indurated and hard.
• Hence the lithology contains sandstone, siltstone, shale and
mudstone.

52. ROCK PROPERTIES
Balukhali Stream
•In Balukhali Stream, sandstone and shale are interbedded
where sandstone beds are 6-10 inches thick and shale beds
are thinner than sandstone beds.d
•Hence sandstone bed sometimes contains concretions
which can be spherical, ellipsoidal, elongated etc. Their origin
is post-depositional, which means that they are diagenetic
(composition of CaCO3 and water).

53. SILTY SHALE
• Mainly thin bedded and platy.
• Olive to grey green coloured.
• It formed in ancient marine environments in soft
sedimentary deposition.

54. SILTYSHALE

55. FISSILE
SHALE
• This shale is a fine-grained
sedimentary rock that
forms from the
compaction of silt and
clay-size mineral particles.
• Fissility is caused by
parallel alignment of platy
mineral grains.

56. LAMINATED
SHALE
• Grayish blue coloured
shale.
• It has lenticularbedding
with cross lamination.
• Lenses of sand and clay
are present.

57. SILTSTONE
• Siltstone is hardened sedimentary rock that is
composed primarily of angular silt-sized particles.
• It is is not laminated or easily split into thin layers.
• It forms where water deposit silt and the silt is then
compacted and cemented into a rock.

58. SILTSTONE-SHALE SUCCESSION

59. MUDSTONE
• Gray colour
• Moderately compacted,
highly porous.
• Very fine grained.
• Argillaceous
• Composed of quartz,
mica, feldspar and ferro-
magnesium minerals.

60. ➢Gas Seepage
➢Gravels
➢Concretions
ECONOMIC MINERAL
DEPOSITS AND RESOURCES

61. • Occurance of natural gas in
sitakundanticline.
• Number of faults cutting
anticlinethat across the gas
reservoirand the gases are
coming through the fault line.
GAS SEEPAGE

62. USES OF GAS
✓Gas is the most important and useful resource of our Bangladesh.
✓It is used in factory for commercial production and also used for
household work.
✓It is the main resource for electricity and fertilizer production.
✓Gas can also be exported and it is a way to earn foreign currency.

63. GRAVELS
• Gravel is a loose aggregation of rock fragments.
• Gravel deposits are being formed as a result of the
weathering and erosion of rocks.
• It is an important commercial product, with a number of
applications.
• Many roadways are surfaced with gravel.
• It is also used in construction of building.

64. Gravel

65. GRAVELS USED IN WALL CONSTRUCTION

66. CONCRETIONS
• It can be used as building block and also used for many household
works due to its hardness.

67. Concretions

68. Day Two
BARAIYADHALA ROAD CUT SECTION
➢ Weather: Sunny
➢Latitude: 22°40’45”N
➢Longitude: 91°38’34”E
➢Number of stations: 9
➢Starting station: BARAIYADHALA SECTION
➢Last station: CHAGALKAINDA

69. Sitakund Upazila, Chittagong ,Bangladesh

70. Magnified Section Two on the Base Map

71. Hiking Track from Baraiyadhala to CK Section

72. Structural features :-
• Overturned fold

73. Overturned Fold
A fold in which
both the limbs dip
in the same
direction is called
an overfold
or overturned
fold.
(but less than 45
degrees)

74. Overturned fold

75. Geomorphic Features
❑Stream
❑Pothole
❑Waterfall
❑Cascade

76. Stream
Water that flows
naturally along
a fixed route
formed by a channel
cut into rock or
ground.

77. Waterfall
A waterfall is a place
where water flows
over a vertical drop or
a series of steep drops
in the course of a
stream or river.
•

78. Cascade
❑ A waterfall
descending over
a steep ,
rocky surface.
❑ A series of
shallow or step
like waterfalls.

79. Sedimentary Structure
❑Nodule
❑Onion Structure
❑Lenticular Bed
❑Conglomerate Bed
❑Gravel
❑Boulders

80. Nodule
A nodule is small,
irregularly rounded
knot, mass, or lump of a
mineral or mineral
aggregate that typically
has a contrasting
composition.

81. Onion Structure
A sedimentary structure
that have an onion like
pattern .
Reason (hypothetical):
- Dewateringof shale due to pressure

82. Lenticular
Bedding
Lenticular bedding is a
sedimentary bedding
pattern displaying
alternating layers of
Shale and Sand.
Sand lens

83. Conglomerate Bed
Conglomerate is
a sedimentary rock usually
composed of rounded quartz
pebbles, cobbles, and
boulders surrounded by a
matrix of sand and finer
component and cementing
material.

84. Gravels
Gravels is an aggregate of
rounded or angular fragment
of rocks and minerals.
According to unified
classification system, particle
sizes ranging from 4.75mm to
76.2mm are categorized as
gravel.

85. Boulders
Boulder is a rock
fragment with size
greater than 25.6
centimeters or (10.1
in) in diameter.

86. Rock Lithology
❑Silty Clay
❑Mudstone
❑Fissile Shale
❑Laminated Shale
❑Calcareous sandstone

87. Silty Clay
Silt is granular material of a
size between sand and
clay.
Clay is a finely-grained
natural rock or soil material .
Combination of those are
called Silty Clay .

88. Mudstone
Mudstone, a type of
mudrock, is a fine-
grained sedimentary
rock whose original
constituents were
clays or muds .

89. Fissile Shale
Fissility is the ability
or tendency of
a rock to split along
flat planes of
weakness .

90. Laminated Shale
Lamination is a small
scale sequence of fine
layers .
Laminations are normally
smaller and less
pronounced
than bedding.
(Less than 1cm ) .
Laminated shale is fine
grained in size .

91. Calcareous
Sandstone
Calcareous sandstone is a
sedimentary rock, formed
by the cementation of
grains of sand (0.063 to 2
mm in diameter) made
with calcium carbonate .

92. 40 m
25m=
10m
5m
Columnar Section of BARAIYADHALA ROAD CUT SECTION(EASTERN FLANK )
(|||)
(||)
(|)
ROCK TYPEUNIT LITHOLOGY
Shale with sandstone
(3-5 inch )
Massive Sandstone
(slightly laminated,
medium to fine
grained )
Interbedded
Sandstone & Shale
(5-8 inch )
lanticular
Cross laminated

93. C.K-1
(5m)
C.K-2
(sin30° x 20)=
( 10m)
C.K-3
(5m)
Unit Rock Type
20m
CHAGOL-KAINDA STREAM SECTION :-
Mudstone , Claystone
Shale with lenticular bedding
Conglomerate Bed , Shale

94. CHAGOL-KAINDA STREAM SECTION :-
C.K -1
C.K-2
C.K-3
Older to younger

95. Economic Rock Deposits & Resources
❑Shale
❑Gravel
❑Boulder

96. Uses of Shale
❑Some shales have
special properties that
make them important
resources.
❑Black shales contain
organic material that
sometimes breaks down
to form natural gas or oil.
❑Other shales can be
crushed and mixed with
water to produce clays
that can be made into a
variety of useful objects.

97. Uses of Gravel
❑In construction,
crushed stone is used as
an aggregate in concrete
mixes.
❑Uses in road base and
coverings.
❑Use in concrete, fill (to
fill in low spots), asphalt,
snow and ice control.
❑ concrete products
such as brick, block,
pipe, and decorative
stone.

98. Uses of Boulder
❑Used in artificial
landscapes.
❑Boulders are
crushed into rock
fragments.
❑Used in the
bases of large
infrastructures.
❑Uses in the dams
to protect the river
bank.

99. Boulders used for home decoration

100. Day Three
Microwave Road Cut Section
Latitude: 22°38’8” N
Longitude: 91°40’ 14” E
Number of Stations: 8
Starting Station: Sitakund Eco Park
Last Station: Chandranath Temple

101. Magnified Section Three on the Base Map

102. Structural Features
Joint Set

103. Joint Set
Joint is a break in a rock
mass where there has
been no relative
movement of rock on
opposite sides of the
break.
Joint Set is the
combination of parallel
joints in the rock.

104. Geomorphic features
 Hill
 Stream
 Cliff
 Ridge

105. Hill

106. Stream
A stream is a body of
water with a current
confined within a bed
and banks

107. Ridge
 A ridge or mountain ridge is a geological feature
consisting of a chain of mountains or hills that
form a continuous elevated crest for some
distance.

108. Ridge in Sitakund Anticline

109. Cliff
 A cliff is a vertical or nearly
verticals,rock exposure.
 Cliff are Formed as erosion
landform by the process of
weathering and erosion

110. Rock lithology
 Shale
 Claystone
 Mudstone

111. Shale
 Shale is a fine-grained,
clastic sedimentary rock
composed of mud that is a
mix of flakes of clay
minerals.
 Tiny fragments (silt-sized
particles) of other
minerals, especially
quartz and calcite.

112. Claystone
 A claystone is a mudrock
which does not split in
parallel blocks.
 In order for a rock to be a
claystone, it must be up
to half (50%) clay, whose
particles measure less
than 1/256th of a
millimeter.

113. Mudstone
 Mudstone, a type of mudrock,
is a fine-grained sedimentary
rock whose original
constituents were clays or
muds.
 Grain size is up to .0625
millimetres (0.00246 in) with
individual grains too small to be
distinguished without a
microscope

114. Sedimentary structure
 Burrows
 Pseudo bed
 Interbedded sandstone
 Ball and pillow structure
 Load cast

115. Burrows
 Burrow is a hole or
tunnel excavated into
the ground by animal.
 A burrow created a
space suitable for
habitation, temporary
refuge, or as a
byproduct of
locomotion.

116. Pseudo bed
 a pseudo bedding
plane has the
appearance of a
bedding plane but is
not actually a bed.

117. Interbedded sandstone
 Alternating layers of
coarse and fine
grained sandstone

118. Ball & pillow structure
 Ball & pillow structure are masses
of clastic sediment that take the
form of isolated pillows or
protruding ball structures.
 These soft-sediment deformations
are usually found at the base of
sandstone beds that are
interbedded with mudstone.
 Also found in limestone beds that
overlie shale.
 Hemispherical and kidney shape.
 Range in size from a few inches to
several feet.

119. Load cast
 Load cast form on the underside of the overlying
denser layer (sands, coarse sands, or gravels),
which is superimposed on a less-dense hydroplastic
layer (muds, silts or finer sands).
 The casts take on the form of slight bulges,
swellings, deep or rounded sacks, knobby
excrescences or highly irregular protuberances.

120. Load Cast in Interbedded Sandstone

121. Day Four
Barabkund Section
• Latitude: 22°34’53” N
• Longitude: 91°41’8” E
• Number of Stations: 8
• Starting Station: CCC High School
• Last Station: Barabkund Temple

122. Station One

123. Hill Cut Section in Station One

124. Station Eight: Barabkund Temple

125. Structural Features
 Joint and Joint Sets
 Local Unconformity

126. Three parallel Joints

127. Local Unconformity
 An unconformity strictly limited to geographic extent
 Develops around the margins of a sedimentary basin
 Sometimes appears like a disconformity
 Identified by presence of residual soil above the surface
of erosion

128. Local Unconformity

129. Geomorphic Features
 Hill
 Gully
 Valley
 Streams
 Streamlets

130. Hill

131. Gully in Barabkund Stream

132. Valley of Barabkund Stream

133. Barabkund Stream

134. Streamlet

135. Sedimentary Structures
 Bedding
 Flaser Bedding
 Lenticular Bedding
 Lamination
 Cross Lamination
 Concretions
 Onion Structures

136. Bedding

137. Flaser Bedding
 Exhibits alternating sand and mud layers
 Typically forms in tidal environment
 Sand ripples are filled by mud
 Mud consolidates rapidly and protects the sand
layers from erosion

138. Flaser Bedding
Source: Panoromio.com

139. Lenticular Bedding
 Displays alternating layers of clay and sand
 Mud suspended in the water settles down on top of sand
 Characterized by sand lenses in mud
 Found in supratidal and intertidal zones
 Evidence of tidal current and tidal rhythm

141. Lenticular Bedding
(Sand lenses in a laminated shale)

142. Unidirectional Cross Lamination

143. Concretions

144. Onion Structure (Oval shaped)

145. New Sedimentary Structures
 Flute Marks
 Sandstone Band
 Gravel Bed
 Convolute Lamination
 Leaf Impression

146. Flute Marks
 Found most commonly in Turbidite Deposits
 Grooves are created in fine sediments by currents
 Sand fills up the grooves
 Sand gets compacted and turns into sandstone
 Underlying shale rock erodes away
 The wavy/groovy bottom of sandstone becomes exposed
 Flute cast is a very useful paleocurrent indicator

147. Flute Marks
Source: Wikipedia

148. Sandstone Band

150. Gravel Bed
 Also known as bench gravel
 A bed of gravel located at the side of a valley
 Represents parts of bed of the stream
 Indicates the former location of the stream

151. Gravel Bed

152. Convolute Lamination
 Forms from turbidity current
 Found in shale and fine sand
 Forms from rapid settlement of turbidites
 Common in intertidal flat deposits

153. Convolute Lamination

155. Leaf Impression
 Found mostly in fissile shale
 Leaf gets buried in fine sediments rapidly
 Overburden pressure increases as new sediments
accumulate
 Hydrogen, oxygen and volatile gases are squeezed
off the leaf due to pressure
 Only a thin carbon film of the leaf is left

156. Leaf Impression in Fissile Shale

158. Rock Lithology
 Sandstone
 Claystone
 Mudstone
 Fissile Shale
 Laminated Shale

159. Continental bed of Sandstone

161. Claystone Beds

162. Mudstones in the stream

163. Fissile Shale

164. Laminated Shale

165. Economic Mineral Deposits &
Resources
 Concretions
 Gravels
 Gas Seepage

166. A Concretion in the stream

167. Gravel deposits

168. Gravel deposits in Barabkund Stream

169. Gravels used in industrial infrastructure

170. Road Construction

171. Gravels in Yard Decoration

172. Gas seepage
 Gas escapes rapidly
through porous
material, small
holes and faults.

174. INTERPRETATION
&
DATA ANALYSIS

175. After gathering various data during the
fieldwork, we studied –
❑ The orientation of the axis of the Anticline
❑ The attitude of the fold limbs
❑ The nature of the anticline
❑ Numerous types of sedimentary structures
❑ Lithology of the rocks
❑ Geomorphic features
❑ Structural features
❑ Economic rocks & mineral deposits

176. STRUCTURAL FEATURES
✓ Anticline
✓ Thrust Fault
✓ Joint
✓ Local Unconformity

177. GEOMORPHIC FEATURES
❑Stream
❑Valley
❑Ridge
❑Rapid
❑Pothole
❑Waterfall
❑Plunge Pool

178. GEOMORPHIC FEATURES
❑ Gully
❑ Cliff
❑ Hill
❑ Gorge
❑ Cascade
❑ Vegetation & Cultivation

179. SEDIMENTARY STRUCTURES
➢ Onion Structure
➢ Lamination
➢ Cross Bedding
➢ Nodules
➢ Concretions
➢ Lenticular Bed
➢ Mud Crack
➢ Alternation of Shale-Sandstone

180. SEDIMENTARY STRUCTURES
➢ Boulders
➢ Conglomerate Bed
➢ Burrows Structure
➢ Ball & Pillow Structure
➢ Load Cast
➢ Flaser Bedding
➢ Flute Cast
➢ Leaf Impression
➢ Convolute Lamination

181. ECONOMIC MINERAL DEPOSITS & RESOURCES
✓ Gravels
✓ Concretions
✓ Gas Seepage
✓ Conglomerates
✓ Ferromagnesian Minerals

182. ANALYSIS OF THE DATA
FROM
COMPASS CLINOMETER READINGS

183. DAY 1 – LABANAKKHYA STREAM
Station Location Attitude of Bed
Dip
Azimuth
AD DD
1(a) 22°39′54′′ N
91°38′51″ E
232° 30° SW
1(b) 285° 44° NW
1(c) 256° 36° SW

184. Day One
Station Number Direction of Dip Amount of Dip
1(a) 256° SW 36°
1(b) 285° SW 44°
1(c) 232° SW 30°
2 142° SE 90°
3 110° SE 85°
4 236° SW 50°
5 342° NW 11°
6 344° NW 20°
7 248° SW 8°
8 76° NE 36°
9 64° NE 40°

185. Data Analysis
(Anticline)
• Strike and dip readings from the first
station indicates westerly dipping
beds.
• Station 3 and 4 represent overturned
beds.
• Station 5 with gently dipping beds
indicates the axis.
• Rest of the stations show beds dipping
in the east.
• This data characterizes a mesoscopic
anticline, known as the Sitakund
Anticline.

186. Data Analysis
(Thrust Fault)
• Presence of overturned beds in every
section gives evidence of a giant
Reverse Fault.
• Plotting the coordinates of the beds in
the base map, we can deduce the
fault line.
• The fault extends in the northwest and
southeast direction.
• Sitakund Anticline is a mesoscopic,
thrust-faulted anticline.

187. Topographic Map of Sitakund Anticline
(With Elevation Scale)

188. Formation Map of Sitakund Anticline

189. Geological Map of Sitakund Anticline

190. Thank You!
Team Ametrine