Leg : 64 Top/Bottom Interval(mm): 280/ 0 Describer: Saunders, A. Hole: 477A Top of Core Depth(m) : 32.50 Rock Type: IGNEOUS Core: 1 Sample Midpoint(m) : 32.78 Sect/Pc #: 1/PCE 4 ROCK = PLAG MODERATELY PHYRIC BASALT; Texture: MODERATELY PORPHYRITIC,QUENCH; Where sampled: NEXT TO GLASSY MARGIN* Phenocrysts- OLIVINE ( 5%) Size(mm): TO 0.5 Morphology: EUHEDRAL-SUBHEDRAL FREQUENTLY INTERGROWN WITH PLAG TO FORM GLOMEROCRYSTS; PLAGIOCLASE ( 5%) Size(mm): TO 1 Morphology: LATH-SHAPED,TABULAR MORE TABULAR XTLS THAN LATH-SHAPED ONES,FREQUENTLY INTERGROWN WITH OL TO FORM GLOMEROCRYSTS; CLINOPYROXENE ( 0%) Groundmass - OLIVINE ( 5%) Size(mm): <0.1 Morphology: SKELETAL VISIBLE BECAUSE OF HIGH R.I.; MICROCRYST GROUNDMASS INCLUDES PLAG + CPX + MAGN + MESOSTASIS,SHEAF TEXTURED PYX AND PLAG MICROLITES,QUENCH TEXTURE, ABOUT 5% OF ROCK CONSISTS OF AGGREGATES AND STRINGS OF OPAQUES (?MAGN)* Alteration - CARBONATE ( 3%) Location: VEINS, Location: CAVITIES CLAY MINERALS ( <2%) Location: VESICLES Replacing: OL SOME REPLACEMENT OF OL,COLOR IS GREEN* Vesicles - Size(mm): 1 Percent: <2 Location: RANDOM Filling: CLAY.MIN Shape: SPHERICAL CLAY.MIN IS GREEN* Leg : 64 Top/Bottom Interval(mm): 500/ 0 Describer: Saunders, A. Hole: 477A Top of Core Depth(m) : 32.50 Rock Type: IGNEOUS Core: 1 Sample Midpoint(m) : 33.00 Sect/Pc #: 1/PCE 7 ROCK = PLAG-OL PHYRIC BASALT; Texture: PORPHYRITIC,INTERGRANULAR; Where sampled: FLOW INTERIOR OR SILL INTERIOR* Phenocrysts- OLIVINE ( <5%) Size(mm): 0.4-1.0 Morphology: ANHEDRAL PLAGIOCLASE ( 20%) Size(mm): 1-4 Morphology: EQUANT-TABULAR APPROX COMP AN65-75,UNZONED RESORBED XTLS WHICH FREQUENTLY OCCUR AS AGGREGATES* Groundmass - PLAGIOCLASE ( 40%) Size(mm): TO 1 Morphology: LATHS APPROX COMP AN50-60; CLINOPYROXENE ( 30%) Size(mm): <1 Morphology: ANHEDRAL APPROX COMP AUGITE,INTERGRANULAR; OPAQUE MINERALS Size(mm): 0.05-0.4 Morphology: ANHEDRAL-CUBIC INCLUDES MAGN + ILMENITE,INTERGRANULAR* Alteration - CLAY MINERALS ( 5%) Location: INTERSTITIAL Replacing: MESOSTASIS REPLACING MESOSTASIS IS QUESTIONABLE* Leg : 64 Top/Bottom Interval(mm): 330/ 0 Describer: Saunders, A. Hole: 477A Top of Core Depth(m) : 32.50 Rock Type: IGNEOUS Core: 1 Sample Midpoint(m) : 34.33 Sect/Pc #: 2/PCE 4 ROCK = PLAG-OL PHYRIC DOLERITE OR BASALT; Texture: COARSE,INTERGRANULAR; Where sampled: FLOW INTERIOR OR SILL INTERIOR* Phenocrysts- OLIVINE ( 5%) Size(mm): 0.5-1.5 Morphology: SUBHEDRAL PLAGIOCLASE ( 15%) Size(mm): 2-4 Morphology: EQUANT LARGE--DISTINCT FROM GROUNDMASS PLAG* Groundmass - OLIVINE ( 5%) Size(mm): <1 Morphology: ANHEDRAL MAY BE MICROPHENOS; PLAGIOCLASE ( 50%) Size(mm): 0.5-2 Morphology: ELONGATE LATHS RARELY OPHITICALLY ENCLOSED IN CPX; CLINOPYROXENE ( 15%) Size(mm): TO 4 Morphology: ANHEDRAL,ELONGATE APPROX COMP ?AUGITE,FREQUENTLY ELONGATE,GENERALLY INTERGRANULAR OPAQUE MINERALS ( 5%) Morphology: ANHEDRAL-EUHEDRAL INCLUDES MAGN (TITAN.MT) + ILMENITE,INTERGRANULAR* Vesicles - Size(mm): <1 Percent: 5 Location: THROUGHOUT Filling: EMPTY Shape: IRREGULAR- Shape: SPHERICAL Leg : 64 Top/Bottom Interval(mm): 140/ 0 Describer: Fornari, D. Hole: 477A Top of Core Depth(m) : 42.00 Rock Type: IGNEOUS Core: 2 Sample Midpoint(m) : 42.14 Sect/Pc #: 1/PCE 3B ROCK = APHYRIC BASALT; Texture: APHYRIC,HYALOPILITIC; Where sampled: GLASSY MARGIN* Phenocrysts- PLAGIOCLASE ( 3%) Size(mm): 0.1-0.5 MICROPHENOS,SOME QUENCH TEXTURE* Groundmass - MAGNETITE ( 2%) Size(mm): 0.05 GLASS ( 90%) MODERATELY ALTERED,BROWNISH BLACK* Alteration - CARBONATE ( 1%) Location: SMALL Location: CAVITIES PALAGONITE ( 4%) Vesicles - Percent: 0 Leg : 64 Top/Bottom Interval(mm): 450/ 0 Describer: Fornari, D. Hole: 477A Top of Core Depth(m) : 42.00 Rock Type: IGNEOUS Core: 2 Sample Midpoint(m) : 42.45 Sect/Pc #: 1/PCE 6B ROCK = PLAG-CPX PHYRIC DOLERITE DOLERITE TO COARSE GRAINED BASALT; Texture: SUBOPHITIC; Where sampled: FLOW INTERIOR* Phenocrysts- PLAGIOCLASE ( 26%) Size(mm): 1-6 Morphology: TABULAR,LATHS APPROX COMP AN50,OFTEN STRONGLY ZONED; CLINOPYROXENE ( 18%) Size(mm): 1-3 Morphology: SUBHEDRAL-ANHEDRAL APPROX COMP AUGITE,FRACTURED ALONG CLEAVAGE* Groundmass - OLIVINE ( 8%) Size(mm): 0.25-0.75 Morphology: SUBHEDRAL-ANHEDRAL PLAGIOCLASE ( 36%) Size(mm): 0.1-0.75 CLINOPYROXENE REPRESENTED IN CPX PHENO %; OPAQUE MINERALS ( 9%) Size(mm): 0.05-0.3 Morphology: CRUCIFORM,TRELLIS-TYPE INCLUDES SOME CRUCIFORM MAGN PIECES + TRELLIS-TYPE ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT* Alteration - COMBINATION ( 3%) INCLUDES CLAY.MIN + ZEOLITES* Vesicles - Percent: 0 Leg : 64 Top/Bottom Interval(mm): 100/ 0 Describer: Fornari, D. Hole: 477A Top of Core Depth(m) : 42.00 Rock Type: IGNEOUS Core: 2 Sample Midpoint(m) : 43.60 Sect/Pc #: 2/PCE 1 ROCK = PLAG PHYRIC DOLERITE OR COARSE BASALT; Texture: INEQUIGRANULAR,COARSE; Where sampled: FLOW INTERIOR OR SILL INTERIOR* Phenocrysts- OLIVINE REPRESENTED IN OL GROUNDMASS %; PLAGIOCLASE ( 16%) Size(mm): 0.5-3.5 Morphology: TABULAR LATHS STRONG NORMAL ZONING; CLINOPYROXENE REPRESENTED IN CPX GROUNDMASS %* Groundmass - OLIVINE ( 9%) Size(mm): 0.25-1 Morphology: EUHEDRAL-ANHEDRAL PLAGIOCLASE ( 38%) Size(mm): 0.1-0.5 CLINOPYROXENE ( 15%) Size(mm): 0.25-1 Morphology: SUBHEDRAL-ANHEDRAL APPROX COMP AUGITE,FRACTURED ALONG CLEAVAGE PLANES; OPAQUE MINERALS ( 13%) Size(mm): 0.05-0.2 INCLUDES MAGN + ILMENITE,ASSOCIATED WITH BREAKDOWN OF MAFIC MINS (CPX + OL),GOOD XTL FORM,PERCENTAGES OBTAINED BY POINT COUNT* Alteration - COMBINATION ( 9%) Location: INTERGRAIN Location: BOUNDARIES INCLUDES CLAY.MIN + ZEOLITES* Leg : 64 Top/Bottom Interval(mm): 280/ 0 Describer: Fornari, D. Hole: 477A Top of Core Depth(m) : 42.00 Rock Type: IGNEOUS Core: 2 Sample Midpoint(m) : 43.78 Sect/Pc #: 2/PCE 3 ROCK = PLAG-OL-CPX PHYRIC DOLERITE; Texture: SUBOPHITIC,VESICULAR; Where sampled: FLOW INTERIOR OR SILL INTERIOR?* Phenocrysts- OLIVINE ( 17%) Size(mm): 0.25-0.75 Morphology: EUHEDRAL-ANHEDRAL VERY FRESH; PLAGIOCLASE ( 14%) Size(mm): 0.5-3 APPROX COMP AN54; CLINOPYROXENE ( 9%) Size(mm): 0.1-0.5 APPROX COMP AUGITE,FRESH ALTHOUGH FRACTURED ALONG CLEAVAGE* Groundmass - OLIVINE REPRESENTED IN OL PHENO %; PLAGIOCLASE ( 39%) Size(mm): 0.1-0.5 CLINOPYROXENE REPRESENTED IN CPX PHENO %; OPAQUE MINERALS ( 9%) Size(mm): 0.05-1 INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT* Alteration - COMBINATION ( 6%) Location: INTERGRAIN Location: BOUNDARIES, Location: PERIPHERY OF Location: VESICLES INCLUDES CLAY.MIN + ZEOLITES* Vesicles - Size(mm): 0.75-1.5 Percent: 6 Location: RANDOM Shape: ROUND LITTLE OR NO FILLING* Leg : 64 Top/Bottom Interval(mm): 480/ 0 Describer: Fornari, D. Hole: 477A Top of Core Depth(m) : 42.00 Rock Type: IGNEOUS Core: 2 Sample Midpoint(m) : 45.48 Sect/Pc #: 3/PCE 7 ROCK = PLAG-CPX PHYRIC BASALT; Texture: PORPHYRITIC,SUBOPHITIC,COARSE-GRAINED; Where sampled: OTHER SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 17%) Size(mm): 0.5-3 Morphology: TABULAR-LATHS STRONG ZONING IN MOST; CLINOPYROXENE ( 16%) Size(mm): 0.5-7.75 Morphology: ANHEDRAL-SUBHEDRAL MOSTLY FRACTURED ALONG CLEAVAGE* Groundmass - OLIVINE ( 4%) Size(mm): 0.1-0.4 Morphology: ANHEDRAL-SUBHEDRAL FEW SUBHEDRAL; PLAGIOCLASE ( 38%) Size(mm): 0.1-0.5 CLINOPYROXENE REPRESENTED IN CPX PHENO %; OPAQUE MINERALS ( 12%) Size(mm): 0.05-0.2 INCLUDES MAGN + ILMENITE,MANY CONCENTRATED AROUND PARTIALLY RESORBED CPX,PERCENTAGES OBTAINED BY POINT COUNT* Alteration - COMBINATION ( 9%) Location: PERIPHERY OF Location: VESICLES INCLUDES CLAY.MIN + ZEOLITES,FOUND BETWEEN CPX + OL GRAINS AND AROUND SOME VESICLES* Vesicles - Size(mm): 0.75-4 Percent: 4 Location: RANDOM Filling: EMPTY Shape: ROUNDED SOME ALTERATION AROUND PERIPHERY* Leg : 64 Top/Bottom Interval(mm): 50/ 0 Describer: Fornari, D. Hole: 477A Top of Core Depth(m) : 42.00 Rock Type: IGNEOUS Core: 2 Sample Midpoint(m) : 46.55 Sect/Pc #: 4/PCE 1 ROCK = PLAG-CPX-OL PHYRIC DOLERITE; Texture: INEQUIGRANULAR; Where sampled: OTHER SILL INTERIOR* Phenocrysts- OLIVINE ( 15%) Size(mm): 0.25-1 Morphology: EUHEDRAL-ANHEDRAL SOME FRACTURING BUT VERY FRESH; PLAGIOCLASE ( 15%) Size(mm): 0.5-4 Morphology: TABULAR,LATHS APPROX COMP AN60,STRONG ZONING,SOME BLEBS + LARGER INCLUSIONS; CLINOPYROXENE ( 15%) Size(mm): 0.25-1.5 Morphology: SUBHEDRAL-ANHEDRAL APPROX COMP AUGITE,MANY FRACTURED ALONG CLEAVAGE, FRESH* Groundmass - OLIVINE REPRESENTED IN OL PHENO %; PLAGIOCLASE ( 40%) Size(mm): 0.1-0.5 MICROLITES; CLINOPYROXENE REPRESENTED IN CPX PHENO %; OPAQUE MINERALS ( 10%) Size(mm): 0.05-0.1 Morphology: SUBHEDRAL-ANHEDRAL INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT* Alteration - COMBINATION ( 5%) Location: INTERGRAIN Location: BOUNDARIES INCLUDES CLAY.MIN + ZEOLITES* Vesicles - Percent: 0 Leg : 64 Top/Bottom Interval(mm): 850/ 0 Describer: Fornari, D. Hole: 477A Top of Core Depth(m) : 42.00 Rock Type: IGNEOUS Core: 2 Sample Midpoint(m) : 47.35 Sect/Pc #: 4/PCE 10 ROCK = PLAG-CPX-OL PHYRIC DOLERITE; Texture: PORPHYRITIC,INEQUIGRANULAR; Where sampled: OTHER SILL INTERIOR* Phenocrysts- OLIVINE ( 15%) Size(mm): 0.1-0.75 Morphology: EUHEDRAL-ANHEDRAL FRESH; PLAGIOCLASE ( 17%) Size(mm): 1-5 Morphology: TABULAR LATHS APPROX COMP AN50-60,SOME ZONED; CLINOPYROXENE ( 17%) Size(mm): 0.3-1 Morphology: SUBHEDRAL-ANHEDRAL APPROX COMP AUGITE,FRACTURED ALONG CLEAVAGE BUT FRESH* Groundmass - OLIVINE REPRESENTED IN OL PHENO %; PLAGIOCLASE ( 39%) CLINOPYROXENE REPRESENTED IN CPX PHENO %; OPAQUE MINERALS ( 10%) INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT* Alteration - COMBINATION ( 2%) Location: INTERGRAIN Location: BOUNDARIES INCLUDES CLAY.MIN + ZEOLITES* Vesicles - Percent: 0 Leg : 64 Top/Bottom Interval(mm): 580/ 0 Describer: Fornari, D. Hole: 477A Top of Core Depth(m) : 55.00 Rock Type: IGNEOUS Core: 3 Sample Midpoint(m) : 55.58 Sect/Pc #: 1/PCE 6A ROCK = PLAG-CPX PHYRIC DOLERITE/GABBRO; Texture: PORPHYRITIC,OPHITIC-SUBOPHITIC,COARSE; Where sampled: OTHER SILL BASE?* Phenocrysts- PLAGIOCLASE ( 32%) Size(mm): 1-3 Morphology: TABULAR LATHS APPROX COMP AN50,STRONG ZONING,SOME SUBOPHITIC TEXTURE; CLINOPYROXENE ( 23%) Size(mm): 0.5-4 Morphology: ANHEDRAL-SUBHEDRAL APPROX COMP AUGITE,EXTENSIVELY FRACTURED ALONG CLEAVAGE,OPHITICALLY ENCLOSING PLAG* Groundmass - OLIVINE ( 6%) Size(mm): 0.25-0.75 Morphology: ANHEDRAL-SUBHEDRAL PLAGIOCLASE ( 25%) Size(mm): 0.1-0.5 CLINOPYROXENE REPRESENTED IN CPX PHENO %; OPAQUE MINERALS ( 10%) Size(mm): 0.05-0.2 Morphology: SUBHEDRAL-ANHEDRAL INCLUDES MAGN + ILMENITE,PERCENTAGES OBTAINED BY POINT COUNT* Alteration - COMBINATION ( 4%) Location: INTERGRAIN Replacing: CPX Location: BOUNDARIES INCLUDES CLAY.MIN + ZEOLITES* Leg : 64 Top/Bottom Interval(mm): 870/ 0 Describer: Saunders, A. Hole: 477A Top of Core Depth(m) : 55.00 Rock Type: IGNEOUS Core: 3 Sample Midpoint(m) : 55.87 Sect/Pc #: 1/PCE 9 ROCK = DOLERITE; Texture: STRONGLY INEQUIGRANULAR,VESICULAR,COARSE; Where sampled: FLOW INTERIOR OR SILL INTERIOR* Phenocrysts- OLIVINE SOME OL LISTED UNDER GROUNDMASS MAY BE PHENOS; PLAGIOCLASE SOME PLAG LISTED UNDER GROUNDMASS MAY BE PHENOS* Groundmass - OLIVINE ( 4.3%) Size(mm): 1-1.5 Morphology: SUBHEDRAL-ANHEDRAL PLAGIOCLASE ( 57.1%) Size(mm): 1-4 Morphology: LATHS THERE IS A SERIATE GRADATION FROM LATH-SHAPED XTLS TO LARGER RESORBED ZONED XTLS; CLINOPYROXENE ( 21.9%) Size(mm): TO 4 Morphology: IRREGULAR APPROX COMP AUGITE,LARGE IRREGULAR XTLS FREQUENTLY SUBOPHITICALLY ENCLOSING PLAG; OPAQUE MINERALS ( 2.2%) INCLUDES MAGN + ILMENITE; MICROCRYST GROUNDMASS ( 5%) Size(mm): <0.5 MICROXLN MESOSTASIS CONTAINING CPX + MAGN + PLAG, USUALLY SURROUNDS VESICLES,PERCENTAGES OBTAINED BY POINT COUNT* Vesicles - Size(mm): TO 4 Percent: 14.2 Location: THROUGHOUT Filling: EMPTY, Shape: SPHERICAL- Filling: MESOSTASIS Shape: IRREGULAR USUALLY EMPTY BUT MAY CONTAIN MICROXLN MESOSTASIS* Leg : 64 Top/Bottom Interval(mm): 200/ 0 Describer: Saunders, A. Hole: 477A Top of Core Depth(m) : 55.00 Rock Type: IGNEOUS Core: 3 Sample Midpoint(m) : 56.70 Sect/Pc #: 2/PCE 2A ROCK = GABBRO; Texture: STRONGLY INEQUIGRANULAR,COARSE-GRAINED; Where sampled: FLOW INTERIOR OR SILL INTERIOR* Phenocrysts- OLIVINE MANY OLIVINES LISTED UNDER GROUNDMASS ARE PHENOS; PLAGIOCLASE MANY PLAGS LISTED UNDER GROUNDMASS ARE PHENOS* Groundmass - OLIVINE ( 6.2%) Size(mm): <1.5 Morphology: ANHEDRAL PLAGIOCLASE ( 69.7%) Size(mm): 0.5-6.0 Morphology: LATHS,TABULAR THERE IS A SERIATE GRADATION FROM LATHS (0.5-1.0 MM/APPROX COMP AN50-60) TO LARGE TABULAR XTLS (1.0-6.0 MM/APPROX COMP AN80?/STRONGLY ZONED); CLINOPYROXENE ( 18.9%) Size(mm): TO 5 Morphology: ANHEDRAL APPROX COMP AUGITE BUT A LOW R.I. CPX IS PRESENT, ANHEDRAL GRAINS OPHITICALLY ENCLOSING PLAG; OPAQUE MINERALS ( 4.9%) Size(mm): <0.5 Morphology: CUBOID-SKELETAL INCLUDES MAGN + ILMENITE,APPROX COMP TITAN.MT, INTERSTITIAL; MICROCRYST GROUNDMASS ( 5%) INCLUDES PYX + PLAG + MAGN,INTERSTITIAL, PERCENTAGES OBTAINED BY POINT COUNT* Alteration - CLAY MINERALS ( 0%) NONE SEEN* Vesicles - Size(mm): 0.5-1.5 Percent: 2 Location: INTERSTICES Filling: EMPTY Shape: IRREGULAR CAVITIES* Leg : 64 Top/Bottom Interval(mm): 950/ 0 Describer: Saunders, A. Hole: 477A Top of Core Depth(m) : 55.00 Rock Type: IGNEOUS Core: 3 Sample Midpoint(m) : 58.95 Sect/Pc #: 3/PCE 13 ROCK = PLAG PHYRIC DOLERITE NOTE:THIN SECTION IS VERY POOR--MUCH OF SLIDE NOT PRESERVED SO NO MESOSTASIS SEEN; Texture: PORPHYRITIC,SUBOPHITIC,COARSE; Where sampled: FLOW INTERIOR OR SILL INTERIOR* Phenocrysts- PLAGIOCLASE ( 15%) Size(mm): TO 5 Morphology: ELONGATE,SUBHEDRAL APPROX COMP AN70,STRONGLY ZONED,NUMEROUS INCLUSIONS* Groundmass - OLIVINE ( 10%) Size(mm): 0.5-2 Morphology: ANHEDRAL MAY BE PHENOS; PLAGIOCLASE ( 50%) Size(mm): 1-2 Morphology: LATH-SHAPED CLINOPYROXENE ( 20%) Size(mm): TO 4 Morphology: IRREGULAR APPROX COMP AUGITE,SUBOPHITICALLY ENCLOSES PLAG; OPAQUE MINERALS ( 4%) Size(mm): <1 Morphology: ANHEDRAL,CUBOID,ELONGATE, Morphology: TRELLIS STRUCTURE INCLUDES MAGN + ILMENITE,APPROX COMP TITAN.MT?* Alteration - CLAY MINERALS ( TR%) Location: INTERSTITIAL WHAT CLAY.MIN ARE REPLACING IS NOT SEEN,COLOR IS GREEN* Leg : 64 Top/Bottom Interval(mm): 1300/ 0 Describer: Saunders, A. Hole: 477A Top of Core Depth(m) : 55.00 Rock Type: IGNEOUS Core: 3 Sample Midpoint(m) : 60.80 Sect/Pc #: 4/PCE 15 ROCK = PLAG-OL PHYRIC BASALT OR DOLERITE; Texture: PORPHYRITIC,DOLERITIC-INTERGRANULAR; Where sampled: FLOW INTERIOR OR SILL INTERIOR* Phenocrysts- OLIVINE ( 4.0%) Size(mm): TO 1 Morphology: SUBHEDRAL-ANHEDRAL PLAGIOCLASE ( 20.4%) Size(mm): TO 5 Morphology: ROUNDED,TABULAR RESORBED,ZONED* Groundmass - OLIVINE ( 5.3%) Size(mm): 0.2-0.5 Morphology: ANHEDRAL PLAGIOCLASE ( 43.7%) Size(mm): TO 1 Morphology: LATHS APPROX COMP AN60-65; CLINOPYROXENE ( 18.4%) Size(mm): <1 Morphology: ANHEDRAL APPROX COMP AUGITE,INTERGRANULAR BETWEEN PLAG; OPAQUE MINERALS ( 6.4%) Size(mm): 0.1-0.2 Morphology: EUHEDRAL-SUBHEDRAL INCLUDES MAGN + ILMENITE,INTERGRANULAR BETWEEN PLAG,PERCENTAGES OBTAINED BY POINT COUNT* Vesicles - Size(mm): <1 Percent: 2 Location: RANDOM Filling: EMPTY Shape: IRREGULAR CAVITIES,RANDOMLY FOUND THROUGHOUT GROUNDMASS* |
Cite as: Deep Sea Drilling Project (1989): Archive of Core and Site/Hole Data and Photographs from the Deep Sea Drilling Project (DSDP). National Geophysical Data Center, NOAA. doi:10.7289/V54M92G2 [access date]
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