scholarly journals DIAGENETIC FEATURES OF PALEO LAGOONAL REEF OF TACIPI AREA, SOUTH CELEBES

2016 ◽  
Vol 24 (2) ◽  
pp. 79
Author(s):  
Andri Slamet Subandrio

Limestone outcrops of the Tacipi area is an ideal carbonate platform part of Neogene East and West Sengkang Basin that are located in the south part of Sulawesi, precisely in western of Bone city. The limestones of this area, outcropping mainly on the north-south oriented hills such as Temapole, Anadara, Tamping, Lappa, etc., are the best reef example in the Tacipi area, as the reef itself, its debris and detritus can be distinguished in the field. Throughout the ridges and pinnacle in Tacipi field the limestones are predominantly homogenous boundstones on the top and detrital bioclastic packstones with local grainstones, and wackestones at the bottom. There are four major reef zonation indentified pacth reef, barrier reef, fore reef and lagoon. The extensive freshwater leaching of fossil fragments and calcareous cement give the preservation of biomouldic and vug pore spaces. Key words : limestones, reef, Tacipi Singkapan batugamping daerah Tacipi merupakan suatu paparan karbonat Neogen yang ideal di timur dan barat Cekungan Sengkan yang terletak di bagian selatan Sulawesi, tepatnya di sebelah barat kota Bone. Batugamping di daerah tersebut, terutama tersingkap berorientasi utara – selatan sejajar gunung-gunung seperti di Tempole, Anadara, Tamping, Lappa dan lain-lain, merupakan contoh terumbu terbesar di daerah Tacipi, sebagai bagian dari terumbu, sisa-sisa dan runtuhannya dapat dibedakan di daerah tersebut. Sepanjang punggungan dan puncaknya di daerah Tacipi, batugamping merupakan bagian utama dari lapisan pengikat yang homogen di bagian atas dan detrital bioklastik koral terpilah buruk dengan lokal struktur butiran secara setempat, dan struktur bioklastik laut pada bagian bawah. Ada empat zonasi utama terumbu yang telah identifikasi sebagai karang gosong, karang penghalang, karang depan dan lagun. Air tawar yang luas terlarut dari pecahan fosil dan semen mengandung zat kapur memberikan pengawetan terhadap jejak-jejak kehidupan dan pori-pori. Kata kunci : batugamping, terumbu, Tacipi

2016 ◽  
Vol 26 (2) ◽  
pp. 95
Author(s):  
Andri Slamet Subandrio ◽  
Ediar Usman

Limestone outcrops of the Tacipi area is an ideal carbonate platform part of Neogene East and West Sengkang Basin that are located in the south part of Sulawesi, precisely in western of Bone city. The limestones of this area, outcropping mainly on the north-south oriented hills such as Temapole, Anadara, Tamping, Lappa, etc., are the best reef example in the Tacipi area, as the reef itself, its debris and detritus can be distinguished in the field. Throughout the ridges and pinnacle in Tacipi field the limestones are predominantly homogenous boundstones on the top and detrital bioclastic packstones with local grainstones, and wackestones at the bottom. There are four major reef zonation indentified pacth reef, barrier reef, fore reef and lagoon. The extensive freshwater leaching of fossil fragments and calcareous cement give the preservation of biomouldic and vug pore spaces. Abstract Limestone outcrops of the Tacipi area is an ideal carbonate platform part of Neogene East and West Sengkang Basin that are located in the south part of Sulawesi, precisely in western of Bone city. The limestones of this area, outcropping mainly on the north-south oriented hills such as Temapole, Anadara, Tamping, Lappa, etc., are the best reef example in the Tacipi area, as the reef itself, its debris and detritus can be distinguished in the field. Throughout the ridges and pinnacle in Tacipi field the limestones are predominantly homogenous boundstones on the top and detrital bioclastic packstones with local grainstones, and wackestones at the bottom. There are four major reef zonation indentified pacth reef, barrier reef, fore reef and lagoon. The extensive freshwater leaching of fossil fragments and calcareous cement give the preservation of biomouldic and vug pore spaces.


1987 ◽  
Vol 133 ◽  
pp. 59-63
Author(s):  
F Surlyk ◽  
J.R Ineson

A new lithostratigraphical unit, the Navarana Fjord Member of latest Llandovery age, is formally erected in this paper. It consists of an up to 80 m thick sequence of amalgamated carbonate conglomerate beds. The member is presently known from the east and west coast of Navarana Fjord, central North Greenland. It rests or, Silurian carbonate platform to the south. To the north of the platform margin scarp it rests on and interfingers with turbidites of the Merqujôq Formation. The member is inc!uded in the Merquj6q Formation and forms an important marker reflecting the final foundering of the outer carbonate platform.


1869 ◽  
Vol 6 (64) ◽  
pp. 442-446
Author(s):  
G. A. Lebour

Geology.—Stated roughly, the geology of the Department of Finistère may be said to consist of two masses of granite, one to the north and one to the south, enclosing between them nearly the whole of the sedimentary rocks of the district. These consist of Cambrian slates and gneiss, Lower, Middle, and Upper Silurian slates and grits, and very small and unimportant patches of Upper Carboniferous shales. The entire mass of these deposits has an east and west direction, and occupies the central part of the Department.


1906 ◽  
Vol 12 ◽  
pp. 415-430
Author(s):  
Ramsay Traquair

In plan the walls surrounding the Acropolis of Sparta form an irregular oblong, terminated to the east and west by two small hills which formed citadels or outlook points. Though no single complete part remains, and in many places the walls are levelled to the ground, the lines can still be traced fairly completely. (Plate VIII. 3.)At the south eastern corner are the ruins of a Roman Stoa of the Imperial period (A). They shew a series of small compartments (Fig. 1), covered with barrel vaults, ten on either side of three larger central rooms, which are roofed with crossgroined vaults and large semicircular niches at the back. The ground on the north side is as high as the vaults and originally must have formed a terrace overlooking the street on to which the Stoa opened on its south side.


1911 ◽  
Vol 17 ◽  
pp. 29-53
Author(s):  
A. W. Gomme

Fabricius' view, based on archaeological evidence, that the lower town of Thebes extended over the high hills East and West of the Kadmeia (Pl. XIX. A) has in general been accepted by subsequent scholars: it has only been modified by the theory of Kalopais and Soteriádes, which makes the town extend yet further eastwards.How weak this archaeological evidence is, was shown by the criticisms of Wilamowitz and Frazer; and the literary evidence suggests quite a different view. It is to this that I wish to draw attention. Any theory based on such evidence is of course liable to be upset at any moment by fresh archaeological discoveries. But in the present uncertainty it may be useful to see to what theory this evidence seems to lead us.Thebes is situate towards the East end of the long range of low, cultivated hills, running eastwards from Helikon as far as Mount Sorós, and dividing the Aonian plain on the North from that of Leuktra and Plataia on the South. Here is a small group of hills, none of them rising much above the general height of the range, divided by the three streams flowing from. South to North, the Plakiótissa (identified with Dirke), a small and nameless brook, and the H. Joánnes (the ancient Ismenos)


1967 ◽  
Vol 62 ◽  
pp. 353-371
Author(s):  
J. J. Coulton

About 10 metres south-west of the sixth-century temple of Hera Akraia at Perachora, and nearly due west of the little harbour lies the small courtyard previously known as the ‘Agora’. Since its purpose is not known, it will here be non-committally referred to as the West Court. It was first excavated in 1932, and more fully, under the supervision of J. K. Brock, in 1933, but it was not entirely cleared until 1939, and it was at that time that the Roman house which stood in the middle of the court was demolished. The West Court is discussed briefly (under the name of ‘Agora’) in Perachora 1 and in the preliminary reports of the Perachora excavations. Short supplementary excavations were carried out in 1964 and 1966 to examine certain points of the structure.In shape the West Court is an irregular pentagon, about 24 metres from north to south and the same from east to west (Fig. 1; Plate 91 a, b). It is enclosed on the west, north, and on part, at least, of the east side by a wall of orthostates on an ashlar foundation. For a short distance on either side of the south corner, the court is bounded by a vertically dressed rock face which is extended to the north-east and west by walls of polygonal masonry. At the south-west corner the west orthostate wall butts against the polygonal wall, which continues for about 0·80 m. beyond it and then returns north for about 8 metres behind it.


1806 ◽  
Vol 96 ◽  
pp. 342-347 ◽  

1. The irregular oval line, delineated on the annexed map (Plate XIV.) shows nearly the inner edge of a limestone bason, in which all the strata of coal and iron ore (commonly called Iron Stone) in South Wales are deposited; the length of this bason is upwards of 100 miles, and the average breadth in the counties of Monmouth, Glamorgan, Carmarthen, and part of Brecon, is from 18 to 20 miles, and in Pembrokeshire only from 3 to 5 miles. 2. On the north side of a line, that may be drawn in an east and west direction, ranging nearly through the middle of this bason, all the strata rise gradually northward; and on the south side of this line they rise southward, till they come to the surface, except at the east end, which is in the vicinity of Pontipool, where they rise eastward.


2002 ◽  
Vol 4 (1-2) ◽  
pp. 69-94 ◽  
Author(s):  
Edouard POTY ◽  
Luc HANCE ◽  
Alan LEES ◽  
Michel HENNEBERT

Six paleogeographic sedimentation areas (s. a.) are recognized in the Namur-Dinant Basin: (1) the Hainaut s. a., (2) the Namur s. a., (3) the Condroz s. a., (4) the Dinant s. a., (5) the Visé-Maastricht s. a., and (6) the southern Avesnois s. a. (only in northern France). Together with the sea-level variations (third-order sequences), local controls influenced the nature of the sedimentary deposits, so the lithostratigraphic successions in each sedimentation area are distinctive. The depositional setting was that of a carbonate platform which evolved from a ramp in the early Tournaisian to a rimmed shelf during the early Viséan and then to a regionally extensive shelf during the middle and late Viséan. Before the Livian, open marine fades were developed to the south, but from the Livian onwards open marine facies were restricted to the north while evaporites developed in the south. This inversion of the normal pattern was probably related to an early phase of Variscan shortening. Dinantian biostratigraphy is mainly based upon foraminifera, rugose corals and conodonts. Fifty formations (including members), 3 groups and 2 informal lithostratigraphic units are briefly described.


Al-Ahkam ◽  
2017 ◽  
Vol 27 (2) ◽  
pp. 213
Author(s):  
Moelki Fahmi Ardliansyah

<p class="IABSSS">Study literature of Islamic Astronomy in case prayer times, is less from getting specific attention. Furthermore, the schedule of prayer times is very complex. Such as its still being distributed in form converting one to another area. It should be computed based on each district or city. Appearing new case that is coordinates point data (latitude and longitude) where used as center point computations. This thesis is researched the effect and importance implementation of center coordinate point from district or city in the determining of prayer times schedule. The research used mathemathic analytic descriptive and comparative analysis methods. With purpose to know in detail the comparation result from prayer times computations using center coordinate point and otherwise. The result of research shows the effect prayer times schedule can be applied for one district or city area. Meanwhile, computed prayer times schedule that use another center point coordinate not exactly can be applied in one district or city area. Though coordinate different value more than 0,5° and its position located in the south and east center coordinate point. Center coordinate point must be applied because at the base this coordinate point have been considered geographical aspect. Where in width side for the north, south, east and west have been considered and have the equilibrium distance.</p><p class="IABSSS">[]</p><p class="IABSSS">Kajian studi Astronomi Islam dalam persoalan waktu salat kurang mendapat perhatian khusus. Padahal persoalan jadwal waktu salat sangat komplek, seperti masih beredarnya jadwal waktu salat yang dikonversi dari satu daerah ke daerah lain. Sudah seharusnya jadwal waktu salat disusun berdasarkan kabupaten atau kota masing-masing. Persoalan baru yang muncul adalah data titik koordinat (lintang dan bujur) mana yang akan digunakan sebagai acuan perhitungannya. Dalam tulisan ini meneliti dampak dan perlunya implementasi titik koordinat tengah kabupaten atau kota dalam perhitungan jadwal waktu salat. Penelitian ini menggunakan metode deskriptif analitis matematis dan analisis komparatif, yang bertujuan untuk mengetahui secara detail hasil perbandingan perhitungan jadwal waktu salat dengan menggunakan titik koordinat tengah dan selain titik koordinat tengah. Penelitian ini menemukan bahwa, dampaknya jadwal waktu salat dapat diberlakukan untuk satu wilayah kabupaten atau kota. Sedangkan jadwal waktu salat yang diperhitungkan menggunakan selain titik koordinat tengah belum tentu dapat diberlakukan untuk satu wilayah kabupaten atau kota, apalagi selisih koordinatnya diatas 0,5° dan posisinya berada di sebelah selatan dan timur  dari titik koordinat tengah. Titik koordinat tengah perlu diimplementasikan, karena pada dasarnya titik koordinat ini telah mempertimbangkan aspek geografis. Dimana dalam segi luas untuk bagian utara, selatan dan timur, barat nya telah dipertimbangkan dan jaraknya pun seimbang.</p>


1992 ◽  
Vol 43 (3) ◽  
pp. 555 ◽  
Author(s):  
PJ Moran ◽  
G De'ath ◽  
VJ Baker ◽  
DK Bass ◽  
CA Christie ◽  
...  

Two series of outbreaks of the crown-of-thorns starfish, Acanthaster planci (L.), have been recorded on the Great Barrier Reef since the early 1960s. Data from scientific surveys and reliable unpublished observations were analysed statistically to quantify the pattern of movement of these outbreaks. Data on outbreak populations were obtained from 84 and 97 reefs for the periods 1966-74 and 1979-91, respectively. Outbreaks during the former period were found to occur further south with time, their rate of movement increasing from 49 km year-1 in 1966 to almost 81 km year-1 by 1974. Two sets of outbreaks were identified during the 1979-91 period, one occurring to the north, and the other to the south, of latitude 16�s. The 'southern drift' in outbreaks was found to be the more dominant of the two, 'travelling faster' for a greater period. Its initial rate of movement was estimated at 77 km year-1 compared with 57 km year -1 for the 'northern drift'. The latter travelled 150 km before it stopped in 1984. In contrast, the 'southern drift' had travelled a distance of 560 km by 1991, although it had also become almost stationary by then. Outbreaks that moved south during 1979-91 followed a path similar to those that occurred in the 1966-74 period. This similarity in the outbreak paths was particularly evident during the first 6 years of each period. In all, 35 reefs were recorded as experiencing both outbreaks, the average time between each being 14.68 years. The origin of the northern and southern patterns in the 1979-91 period was found to coincide, suggesting that the likely epicentre for primary outbreaks is close to latitude 16�s.


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