Geology of Kuwawur, Sukolilo District, Pati Regency, Central Java Province johan
ABSTRAK
Maliki, J.,(2009), Geology of Kuwawur, Sukolilo District, Pati Regency, Central
Java Province, Geological Mapping Report (unpublised), Geological Engineering
Program, Faculty of Engineering, Diponegoro University.
G e o lo g ic a l ma p p ing a ims to d e te rmine the c o nd itio n o f lo c a l g e o lo g ic a l
ma p p ing . Ma p p ing a re a is lo c a te d in Kuwa wur a re a , d istric t Suko lilo , Pa ti
re g e nc y, C e ntra l Ja va Pro vinc e . Fro m the o b se rva tio n in the fie ld , the n
the ma p p ing a re a is d ivid e d into 4 units o f g e o mo rp ho lo g y units na me ly
the c o ne ka rst o f ste e p hills, und ula ting hills unit c o ne ka rst a nd a lluvia l
p la ins ka rst units. Dra ina g e p a tte rn tha t d e ve lo p e d in the re g io n a re
p a ra lle l a nd ma p p ing multib a sina l. Stra tig ra p hy o f the ma p p ing o f ro c k
units with 5 units o f the ro c k se q ue nc e fro m the o ld e st to the yo ung e st o f
b a tup a sir units, units b a tup a sir ka rb o na ta n, b a tug a mp ing units, units a nd
unit b a tug a mp ing c o ra l a lluvium. Ma p p ing re g io na l g e o lo g ic histo ry
b e g a n in the Mid d le Mio c e ne the sub sid e nc e o c c urs with a g e b a tup a sir
unit N9 la nd sub sid e nc e in the e nviro nme nt. Afte r tha t tra nsg re sive
o c c up ie d tha t a re a . The c a rb o na c e o us sa nd sto ne unit d e p o site d with
a g e N10 - N13. Afte rwa rd , tra nsg re ssive e ve nt ha p p e ne d a nd lime sto ne
d e p o site d in a g e N13 - N16 a nd fo llo we d te c to nic p ro c e sse s tha t fo rme d
up G . Ng e ma d a fa ult. The ne xt g e o lo g ic a l p ro c e ss is o f re g re ssio n in the
e a rly La te Mio c e ne units tha t c o ra l lime sto ne d e p o site d c o nfo rmitie s o n
the lime sto ne units. C o ra l lime sto ne with a g e N17 - N19 fo rme d in the inne r
she lf se d ime nta tio n e nviro nme nt. Afte r the fo rma tio n o f c o ra l lime sto ne
units, the n g e o lo g ic p ro c e sse s is te c to nic p ro c e sse s tha t fo rme d the
g e o lo g ic a l struc ture o f fa ult i.e . a Ng liria n trust fa ult a nd a K. Ne ng e r
no rma l fa ult. Be sid e tha t, the mino r g ra b e n struc ture in K. Ba nto s ha s
fo rme d a s we ll. a fte r tha t a ll the units o f ro c k up lifte d to the surfa c e . The n,
a fte r up lifte d , no d e p o sitio na l e ve nt a g a in (no n-d e p o sitio n). In the
Ho lo c e ne e ra , it wa s ha p p e ne d p re c ip ita tio n o f a lluvium (Q a ) d ue to
e xo g e nic p ro c e ss. G e o re so urc e s o f this a re a a re lime sto ne mining , sp ring s,
irrig a tio n a nd fa rm fie ld s a nd the use o f so il a s a tile -ma king ma te ria ls a s
we ll. Whe re a s fo r g e o lo g ic a l d isa ste rs tha t ha p p e ne d wa s a la nd slid e a s a
re sult
of
mining
a c tivitie s.
Ke ywo rd s: g e o mo rp ho lo g y, Stra tig ra p hy, ka rst, tra nsg re si, re g re ssio n.
vi
Maliki, J.,(2009), Geology of Kuwawur, Sukolilo District, Pati Regency, Central
Java Province, Geological Mapping Report (unpublised), Geological Engineering
Program, Faculty of Engineering, Diponegoro University.
G e o lo g ic a l ma p p ing a ims to d e te rmine the c o nd itio n o f lo c a l g e o lo g ic a l
ma p p ing . Ma p p ing a re a is lo c a te d in Kuwa wur a re a , d istric t Suko lilo , Pa ti
re g e nc y, C e ntra l Ja va Pro vinc e . Fro m the o b se rva tio n in the fie ld , the n
the ma p p ing a re a is d ivid e d into 4 units o f g e o mo rp ho lo g y units na me ly
the c o ne ka rst o f ste e p hills, und ula ting hills unit c o ne ka rst a nd a lluvia l
p la ins ka rst units. Dra ina g e p a tte rn tha t d e ve lo p e d in the re g io n a re
p a ra lle l a nd ma p p ing multib a sina l. Stra tig ra p hy o f the ma p p ing o f ro c k
units with 5 units o f the ro c k se q ue nc e fro m the o ld e st to the yo ung e st o f
b a tup a sir units, units b a tup a sir ka rb o na ta n, b a tug a mp ing units, units a nd
unit b a tug a mp ing c o ra l a lluvium. Ma p p ing re g io na l g e o lo g ic histo ry
b e g a n in the Mid d le Mio c e ne the sub sid e nc e o c c urs with a g e b a tup a sir
unit N9 la nd sub sid e nc e in the e nviro nme nt. Afte r tha t tra nsg re sive
o c c up ie d tha t a re a . The c a rb o na c e o us sa nd sto ne unit d e p o site d with
a g e N10 - N13. Afte rwa rd , tra nsg re ssive e ve nt ha p p e ne d a nd lime sto ne
d e p o site d in a g e N13 - N16 a nd fo llo we d te c to nic p ro c e sse s tha t fo rme d
up G . Ng e ma d a fa ult. The ne xt g e o lo g ic a l p ro c e ss is o f re g re ssio n in the
e a rly La te Mio c e ne units tha t c o ra l lime sto ne d e p o site d c o nfo rmitie s o n
the lime sto ne units. C o ra l lime sto ne with a g e N17 - N19 fo rme d in the inne r
she lf se d ime nta tio n e nviro nme nt. Afte r the fo rma tio n o f c o ra l lime sto ne
units, the n g e o lo g ic p ro c e sse s is te c to nic p ro c e sse s tha t fo rme d the
g e o lo g ic a l struc ture o f fa ult i.e . a Ng liria n trust fa ult a nd a K. Ne ng e r
no rma l fa ult. Be sid e tha t, the mino r g ra b e n struc ture in K. Ba nto s ha s
fo rme d a s we ll. a fte r tha t a ll the units o f ro c k up lifte d to the surfa c e . The n,
a fte r up lifte d , no d e p o sitio na l e ve nt a g a in (no n-d e p o sitio n). In the
Ho lo c e ne e ra , it wa s ha p p e ne d p re c ip ita tio n o f a lluvium (Q a ) d ue to
e xo g e nic p ro c e ss. G e o re so urc e s o f this a re a a re lime sto ne mining , sp ring s,
irrig a tio n a nd fa rm fie ld s a nd the use o f so il a s a tile -ma king ma te ria ls a s
we ll. Whe re a s fo r g e o lo g ic a l d isa ste rs tha t ha p p e ne d wa s a la nd slid e a s a
re sult
of
mining
a c tivitie s.
Ke ywo rd s: g e o mo rp ho lo g y, Stra tig ra p hy, ka rst, tra nsg re si, re g re ssio n.
vi