Orthopyroxene-Bearing Rocks of Charnockitic Affinities in the South Savanna--Kanuku Complex of British Guiana

The observations herein recorded were carried out on a portion of the foreshore and of the low-lying front-lands in the vicinity of Georgetown, British Guiana, during the months of January, 1925, and July and August, 1926. The results obtained appear to be of sufficient interest to warrant their being placed on record as throwing further light on the breeding-habits of two important mosquitos of this Colony, namely, Anopheles tarsimaculatus, Goeldi, and Aëdes taeniorhynchus, Wied.The principal area in which the investigations were carried out is situated to the north of Kitty Village outside of the Sea Wall and is bounded on the south by that wall, on the west by the Kitty Groyne, and on the east by another groyne (Case Groyne) erected a few years ago as part of the sea-defences. The area measures roughly from east to west about 700 yards and from north to south about 200 yards at its greatest width, and about 60 yards at its narrowest part, these being situated at the western and eastern boundaries respectively. The accompanying sketch-map gives a general plan of the area. The places from which mosquito larvae were collected are indicated on the plan, Anopheles by black spots, Aëdes by concentric rings.

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Notes on some animal parasites in British Guiana

Bulletin of Entomological Research ◽

10.1017/s0007485300017491 ◽

1916 ◽

Vol 7 (2) ◽

pp. 179-190 ◽

Cited By ~ 5

Author(s):

G. E. Bodkin ◽

L. D. Cleare

Keyword(s):

Sea Level ◽

Sand Dunes ◽

Coastal Region ◽

The South ◽

British Guiana ◽

North East ◽

The North ◽

South West ◽

Western Side ◽

River Valleys

British Guiana lies between the latitudes 0·41′ N. (source of the Essequebo River) and 8° 33′ 22″ N. (Punta Playa), has a depth from north to south of about 500 miles, a seaboard of about 270 miles trending in a south-easterly direction, and occupies in the north-east of South America an area approximately equal in extent to Great Britain. It is bounded on the north by the Atlantic Ocean, on the east by Surinam or Dutch Guiana, on the south and south-west by Brazil, and on the west by Venezuela.The Colony may be divided broadly into three belts. The northern one consists of a low-lying flat and swampy belt of marine alluvium—the coastal region. This rises gradually from the seaboard and extends inland for a distance varying from 5 to 49 miles. It is succeeded by a broader and slightly elevated tract of country of sandy and clayey soils. This belt is generally undulating, and is traversed in places by sand-dunes rising from 50 to 180 ft. above sea-level. The more elevated portion of the Colony lies to the southward of the above-mentioned regions. It rises gradually to the south-west, between the river valleys, which are in many parts swampy, and contains three principal mountain ranges, several irregularly distributed smaller ranges, and in the southern and eastern parts numerous isolated hills and mountains. The eastern portion is almost entirely forest-clad, but on the south-western side there is an extensive area of flat grass-clad savannah land elevated about 300 feet above sea-level.

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Cordierite in the Pre-Cambrian Rocks of the South Savannas, British Guiana

Geological Magazine ◽

10.1017/s0016756800050391 ◽

1966 ◽

Vol 103 (1) ◽

pp. 36-43 ◽

Cited By ~ 2

Author(s):

S. Singh

Keyword(s):

Regional Metamorphism ◽

Contact Aureole ◽

The South ◽

British Guiana ◽

Definite Pattern

AbstractThe mineral cordierite occurs in Pre-Cambrian gneisses, granulites, and granites of the Guyana Shield in British Guiana. In the Acid Biotite Gneisses and Acid Granulites forming the Kanuku Group, the mineral was formed during regional metamorphism. Considerable enrichment of cordierite occurs in the contact aureole around the South Savanna Granite. Cordierite of xenocrystal origin also occurs in the South Savanna Granite and its apophyses. The 2V and optic sign of the mineral varies widely, and no definite pattern in relation to the paragenesis of the mineral is recognized. Untwinned cordierites are predominant in regionally metamorphosed rocks while lamellar, interpenetration and sector twins are characteristic of cordierites in contact hornfelsed aureole rocks.

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Presidential Republicanism in the South, 1960

The Journal of Politics ◽

10.1017/s002238160001656x ◽

1962 ◽

Vol 24 (2) ◽

pp. 303-322 ◽

Cited By ~ 3

Author(s):

Bernard Cosman

Keyword(s):

The South

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Long-term Cyclic Variations of Prominences, Green and Red Coronae over Solar Cycles

International Astronomical Union Colloquium ◽

10.1017/s0252921100064496 ◽

2000 ◽

Vol 179 ◽

pp. 201-204

Author(s):

Vojtech Rušin ◽

Milan Minarovjech ◽

Milan Rybanský

Keyword(s):

Emission Lines ◽

High Latitudes ◽

Green Line ◽

Solar Cycles ◽

The South ◽

Coronal Emission ◽

Local Maxima ◽

The North ◽

Cyclic Variations

AbstractLong-term cyclic variations in the distribution of prominences and intensities of green (530.3 nm) and red (637.4 nm) coronal emission lines over solar cycles 18–23 are presented. Polar prominence branches will reach the poles at different epochs in cycle 23: the north branch at the beginning in 2002 and the south branch a year later (2003), respectively. The local maxima of intensities in the green line show both poleward- and equatorward-migrating branches. The poleward branches will reach the poles around cycle maxima like prominences, while the equatorward branches show a duration of 18 years and will end in cycle minima (2007). The red corona shows mostly equatorward branches. The possibility that these branches begin to develop at high latitudes in the preceding cycles cannot be excluded.

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