Morobe Province

Wikidata ID: Q853664

Lithology and Age: Mesozoic-Cenozoic sedimentary and volcanic rocks ( Chorlton (2007) )       Macrostrat Geological Map Link

Geonames ID: 2090468       Getty Thesaurus of Geographic Names ID: 1000898

Mindat Loc ID: 29062

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Slides:

IL_1_97

CAUTION: Section less than 30microns. Lakakulu clay used by Sio potters. Pyroxene is pale green, angular, and dominates. The clay is brown and contains small feldspar grains, less than 0.1 mm across. There are minor ferruginized clay and feldspar clasts up to 1 mm across. Opaque minerals are small a minority. There is a trace of volcanic rock fragments containing feldspar and small magnetite crystals.

IL_1_39

Madang style sherd. CAUTION: Section less than 30microns. Plagioclase (5%), volcanic rock fragments (<5%), ferruginized pellets and accessory shell fragments are all less than 0.6 m in diameter. The clay is red brown and contains abundant fine grained quartz, feldspar and iron oxides.

IL_1_1

Madang style sherd. "CAUTION: Section less than 30microns. This sherd contains a mixture of shelly fragments, pyroxene, plagioclase , iron oxide and volcanic rock fragments. All these components are present in roughly the same amounts. The grain size rarely exceeds 0.3 mm in length. There are some large clasts made up of ferruginized clay and feldspar. These could be weathered volcanic rock fragments or previous pot fragments. The clay is dark brown.

IL_1_61

Sio style sherd. CAUTION: Section less than 30microns. Pyroxene grains range in size from 0.1 up to 0.7 mm in length. There are some ferruginized clay pellets, up to 2 mm in length. Minor plagioclase and iron oxide minerals are also present. The sherd also contains abundant fine grained quartz grains, less than 0.1 mm

IL_1_17

Sio style sherd. CAUTION: Section less than 30microns. Closely packed pyroxene grains are about 0.3 mm in length. There are some altered volcanic rock fragments and iron oxides. Small angular plagioclase grains are accessory.

IL_1_60

X style sherd. CAUTION: Section less than 30microns. This red brown sherd is characterized by sub rounded to rounded black clasts up to 2 rnn across and small amounts of quartz grains widely scattered through the sherd.

IL_1_38

Madang style sherd. CAUTION: Section less than 30microns. Pyroxene and plagioclase grains are up to 0.3 mm in length. Magnetite grains are subrounded and elongate and less than 0.2 mm. Volcanic rock fragments are less than 0.2 mm in length. There are some minor quartzitic grains and red ferruginized grains. The clay is red brown and contains a small percentage of quartz and feldspar.

IL_1_57

Madang style sherd. CAUTION: Section less than 30microns. Pyroxene occurs in grains up to 0.3 mm in length. Shelly fragments, are subrounded and less than 0.3 mm in length. Opaque minerals and black ferruginized grains are minor. There are some rock fragments containing pyroxene and plagioclase crystals, opaques and a trace of altered glass. Between these large grains there are abundant fine angular quartz grains.

IL_1_58

Madang style sherd. CAUTION: Section less than 30 microns. Shelly fragments are generally subrounded and about 0.2 mm across. Plagioclase grains are about 0.1 mm in diameter and there are abundant small quartz grains widely scattered through the sherd. Opaque minerals are minor and there are some red to black ferruginized clasts. Pyroxene is rare.

IL_1_18

Sio style. CAUTION: Section less than 30microns. This dark red to black sherd contains abundant quartz and plagioclase up to 0.1 mm in length. There are some large pyroxene and volcanic rock fragments up to 0.4 mm in length but these grains are only accessory.

IL_1_31

Sio style. CAUTION: Section less than 30microns. Pyroxene grains (<10%) are generally about 0.3 mm in length. Plagioclase grains (<5%) are less than 0.2 nm in length. There are some volcanic rock fragments, up to 0.7 mm across which are mainly composed of plagioclase laths, fine opaques and altered glass. This sherd also contains accessory iron oxides and red ferruginized grains.

IL_1_15

Sio style. CAUTION: Section less than 30microns. Pyroxene crystals are less than 0.5 mm in length and make up about 5% of the sherd. Plagioclase grains are less than 0.2 mm in diameter and make up less than 5%. There are also some volcanic rock fragments, ferruginized clasts and opaque minerals. The clay is dark brown.

IL_1_12

Sio style. CAUTION: Section less than 30microns. Pyroxene grains (<5%) are up to 0.5 mm in length. There are some large clasts more than 1 mm in length which resemble previous pot fragments. There are some red to black ferruginized grains and volcanic rock fragments. There is a small amount of fine grained quartz and feldspar in the brown clay.

IL_1_66

Sio style. CAUTION: Section less than 30microns. Pyroxene grains (<5%) are up to 0.3 mm in length. Red ferruginized clasts (<1%). Opaques and strongly altered volcanic rock fragments are accessory components. The sherd also contains less than 5% of fine grained angular quartz.

IL_1_63

Sio style. CAUTION: Section less than 30microns. Pyroxene grains (10%) are generally less than 0.3 mm in length. There are several large (up to 0.8 mm) dark ferruginized clasts and minor weathered volcanic rock fragments and angular quartz grains.

IL_1_55

Madang style. Paddle impressed. CAUTION: Section less than 30microns. Pyroxene grains (10%) range in size from 0.1 up to 0.7 mm in length. Quartz and feldspar grains (<10%) range from less than 0.1 up to 0.2 mm in length. There are some hypocrystalline volcanic rock fragments which contain large pyroxene crystals set in a ground mass of smaller pyroxene crystals, plagioclase, opaques and altered glass. The sherd also contains trace amounts of iron oxide and carbonate shell fragments.

IL_1_37

Madang style. CAUTION: Section less than 30microns. This sherd is characterized by angular to subrounded magnetite grains (5%) less than 0.2 mm in length. Pyroxene grains (1%) are less than 0.2 mm in length. Plagioclase grains (<1%) are generally less than 0.2 mm in length. But there are rare grains of quartz and feldspar up to 1 mm across. There are also trace amounts of red ferruginized grains and rare shell in the red clay.

IL_1_28

Sio style. CAUTION: Section less than 30microns. Pyroxene grains (<5%) are up to 0.5 mm in length. There are minor chert fragments, red ferruginized clasts and iron oxide grains. The clay is pale brown and contains abundant fine grained quartz and feldspar. Volcanic rock fragments are rare.

IL_1_68

Sio style. CAUTION: Section less than 30microns. Pyroxene grains (<5%) are up to 0.3 mm in length. Angular quartz and feldspar grains make up about 10% of the sherd. These grains are generally small, <0.1 mm but range up to 0.2 mm. Opaque grains, (<5%) are subrounded and up to 0.4 mm in length. There are some minor rock fragments. The clay is red brown.

IL_1_21

Madang style. CAUTION: Section less than 30microns. Subrounded shelly fragments up to 0.3 mm in diameter make up less than 10%. Quartz, chert and feldspar grains (<10%) are all less than 0.2 mm in length. There are some dark red-black ferruginized clasts up to 0.5 mm and the clay is brown.

IL_1_20

Madang style. CAUTION: Section less than 30microns. Angular feldspar and chert grains make up less than 10% of the sherd and are up to 0.4 mm in length. Volcanic rock fragments are found in two forms, one form consists of long thin plagioclase laths and skeletal iron oxides set in altered glass. The other form contains eutectic intergrowths of quartz and feldspar. The sherd also contains red ferruginized c lasts, iron oxides and minor pyroxene. The clay is red brown.

IL_1_6

Madang style. CAUTION: Section less than 30microns. Quartz and plagioclase (about 10%) are less than 0.3 mm in length. There are some large volcanic rock fragments which contain plagioclase and pyroxene laths with minor iron oxide and also volcanic rock fragments which contain potash feldspar, plagioclase and quartz. Pyroxene grains are minor components and are up to 0.4 mm in length. There are also ferruginized clasts and iron oxides. The clay is red brown.

IL_1_56

Pyroxene grains (10%).Quartz and feldspar grains (<10%). There are some hypocrystalline volcanic rock fragments which contain large pyroxene crystals set in a ground mass of smaller pyroxene crystals, plagioclase, opaques and altered glass. The sherd also contains trace amounts of iron oxide and carbonate shell fragments.

IL_1_93

CAUTION: Section less than 30microns. Kukumei clay used by potters. Consists predominately of shelly fragments about 0.2 mm across. Some of the shelly fragments show cellular structure and are clearly corals and molluscs. There is minor feldspar and pyroxene grains, less than 0.2 mm across. Subrounded opaques, less than 1%. And a trace of collophane.

JS_1_37

Type X, GrogC

JS_1_38

Type X sherd.

JS_1_14

Type X sherd. Grog C.

JS_1_39

Type X, GrogA

JS_1_40

Type X sherd.

JS_1_42

Type X sherd. GrogA.

JS_1_43

Type X sherd.

JS_1_44

Type X, GrogA

JS_1_45

Type X, GrogB

JS_1_47

Type X sherd.

IL_1_100

Tuam clay. This is a potential clay source of tpr179a. No inclusions except for oxides.

IL_2_5

Lapita style. The pale brown clay contains remnant shelly fragments, up to 0.3 mm in length. Volcanic rock fragments contain mainly plagioclase crystals and tiny feldspar grains up to 0.5 mm in length. Subrounded ferruginized clasts and angular feldspar grains are about 0.2 mm in length. Contains wavy layers of red brown clay.

IL_2_1

Sio style sherd. "CAUTION: Section less than 30microns. Pyroxene crystals are angular and about 0.4 mm in diameter. They are unaltered and show prominent cleavage traces. Volcanic rock fragments essentially contain ferruginized glass, feldspar crystals and small plagioclase laths. Opaques, rounded red brown clay clasts, ferruginized fossil fragments and feldspar grains are minor components. The clay is dark brown.

IL_2_8

Lapita style. CAUTION: Section less than 30microns. This sample contains colourless to pale green pyroxene crystals (10%) up to 0.4 mm in length. Angular feldspar grains are up to 0.3 mm in length and there is less than 5%. There are rare grains of volcanic rock fragments up to 0.4 mm across, elongate to rounded ferruginized clasts of clay up to 2 mm in length, and carbonate shell fragments, about 0.5 mm across.

IL_2_7

Lapita sherd. CAUTION: Section less than 30microns. This sample is similar to 8/1 but contains more and larger shelly fragments and fewer and smaller pyroxene grains. Volcanic rock fragments are up to 0.8 mm in length and consist of small feldspar crystals and opaque particles set in a glassy groundmass.

IL_2_6

Lapita sherd. CAUTION: Section less than 30microns. This sample has reddish brown clay containing pyroxene crystals up to 0.5 mm in length. Feldspar grains up to 0.5mm in length, show growth rings. Volcanic rock fragments are composed mainly of glass with minor feldspar crystals. Opaque grains are up to 0.2 mm across.

IL_2_4

Type Y style. Contains high levels of amphibole. The amphibole is green to brown and the blades and prisms range from 0.1 to 0.5 mm in length. The angular amphibole grains make up about 10% of the sherd. Plagioclase (<10%) occurs as large rectangular crystals which show growth rings. Some of the grains are partly sericitized. Other plagioclase crystals are small and angular. Magnetite (<1%) .

IL_2_3

Type Y style. This sherd contains quartz, feldspar, amphibole, pyroxene, magnetite, spinel, rock fragments, ferruginized clay clasts and relict shells. The quartz and feldspar grains (10%) are generally angular and 0.2 mm in length. Amphibole blades (<5%) are green to brown, and less than 0.2 mm across. Magnetite (5%) occurs as rounded grains. Pale green pyroxene crystals are rare. Spinel is an accessory mineral occurring as angular grains up to 0.2 mm.

IL_2_2

Sio style. CAUTION: Section less than 30microns. in diameter. Volcanic rock fragments (<10%) are up to 0.5 rnn across and contain feldspar microlites, opaques and altered glass. Angular pyroxene crystals are accessory. Elongate and rounded pellets are devoid of inclusions. The sherd also contains some large (up to 2 nm in length) ferruginized fragments which also contain opaques and plagioclase. These may be broken pot fragments. Opaque minerals.

IL_2_59

Sio style sherd. CAUTION: Section less than 30microns. The pyroxene, Less than 5% forms elongate angular grains up to 0.3 mm in length. Angular feldspar grains (<5%) are widely scattered through the clay. There are a small number of dark brown to black ferruginized clasts. Angular rock fragments are composed of plagioclase laths and altered glass. There are some large fragments, up to 2 mm in length, which are composed of fine particles of clay, feldspar and brown iron oxide.

IL_2_16

Madang style sherd. "CAUTION: Section less than 30microns. Pyroxene grains (<5%) are sub angular to sub rounded and up to 0.3 mm in length. Plagioclase grains, (<5%) are less than 0.2 mm in length. Sub rounded shelly fragments make up less than 2%. There is accessory volcanic rock fragments, red clay clasts and iron oxides.

IL_2_45

Sio style sherd. CAUTION: Section less than 30microns. Pyroxene crystals are elongate, up to 0.4 mm in length and are the dominant temper. Small amounts of plagioclase ranging in size from 0.1 to 0.3 mm in length are also present. The clay is dark brown.

IL_2_33

Sio style sherd. CAUTION: Section less than 30microns. Pyroxene crystals are generally 0.3 mm in length. There is also minor amounts of altered volcanic rock fragments up to 1 mm across. Ferruginized clay clasts up to 0.5 mm across and small angular feldspar grains. The clay is dark red brown.

IL_2_67

Sio style sherd. "CAUTION: Section less than 30microns. Pyroxene occurs as elongate blades and short stubby crystals ranging from 0,1 to 0.4 mm in length. Rectangular and angular plagioclase crystals, show weak seritization. Angular rock fragments generally contain plagioclase crystals, altered pyroxene crystals and opaques, all of which are less than 0.1 mm in length. Rounded red clay pellets are up to 0.3 nm in diameter. The clay is dark red brown.

IL_2_57

Sio style sherd. CAUTION: Section less than 30microns. Pyroxene grains occur as elongate blades, up to 0.5 mm in length, angular stubby grains 0.2 mm in length, and as well developed crystals up to 0.3 mm across. Small angular plagioclase grains. Rock fragments composed of plagioclase crystals up to 0.3 nm in length are rare. Volcanic rock fragments are generally less than 0.2 mm in length and composed of opaques, clay and relict feldspar.

IL_2_65

Sio style sherd. CAUTION: Section less than 30microns. Pyroxene crystals are abundant and make up most of the sample. They are closely packed, angular and about 0.3 mm in length. Plagioclase crystals are a minority. Opaque minerals are rare The clay is red brown.

IL_2_60

Sio style sherd. CAUTION: Section less than 30microns. Contains abundant pyroxene and smaller amounts of volcanic rock fragments, plagioclase crystals and clay.

IL_2_29

Sio style sherd. CAUTION: Section less than 30microns. Pyroxene crystals range from 0.1 to 0.5 mm in length. Plagioclase crystals are angular and less than 0.2 mm in length. Volcanic rock fragments are less than 0.5 mm in length and contain relict plagioclase, altered glass and mafic minerals and fine opaques. The clay is dark brown.

IL_2_35

Madang style sherd. CAUTION: Section less than 30microns. Pyroxene crystals are about 0.3 mm in length. Plagioclase crystals are about 0.1 mm in length. Volcanic rock fragments are hypohyaline in texture and consist of plagioclase laths and altered glass. The are some yellow brown rounded clay clasts, red clay clasts, subrounded iron oxides are about 0.2 mm in length. The clay is brown and contains fine quartz and ferruginized opaques.

IL_2_15

Madang style sherd. CAUTION: Section less than 30microns. Does not contain carbonate shell fragments and there are some large porphyritic dacite rock fragments. Volcanic rock fragments are also more abundant.

IL_2_19

Sio style sherd. CAUTION: Section less than 30microns. Shelly fragments are generally subrounded and less than 1 mm in diameter. Pyroxene grains are up to 0.3 mm in length. Plagioclase occurs as angular grains less than 0.2 mm in length. There is also accessory iron oxides and red clay pellets. The clay is red brown

IL_2_25

Sio style sherd. CAUTION: Section less than 30microns. Shelly fragments, are up to 1 mm in length. Pyroxene crystals, plagioclase crystals range in size from <0.1 up to 0.2 mm in length. There is also accessory iron oxide grains and the clay is red brown.

IL_2_56

Madang style sherd. CAUTION: Section less than 30microns. Angular and subrounded feldspar grains, are generally 0.2 mm in diameter. Rock fragments are both volcanic and quartzitic. Volcanic rock fragments, up to 0.3 mm in length, generally contain plagioclase, opaques and minor pyroxene. A few grains consist of abundant iron oxide, altered glass and minor plagioclase. The quartz rock fragments are subrounded, about 0.2 mm across and are composed of small quartz mosaics.

IL_2_55

Madang style sherd. CAUTION: Section less than 30microns. Angular to subrounded plagioclase crystals are the main mineral component. Pyroxene grains up to 0.3 m in length. Altered rock fragments generally contain plagioclase microlites and glass. Ferruginized clay clasts up to 1 mm in length are rare. Red iron oxide pellets and black magnetite present.

IL_2_20

Sio style. CAUTION: Section less than 30microns. Pyroxene grains (5%) are generally less than 0.4 m in length. Plagioclase laths (5%) are less than 0.2 mm in length. There are some large volcanic rock fragments made up of abundant plagioclase laths, minor pyroxene and fine grained opaques in a hypocrystallne texture. Accessory iron oxide and red ferruginized clay pellets are also present. The clay is dark brown.

IL_2_61

Sio style. CAUTION: Section less than 30microns. Pyroxene crystals (<5%) are pale green to brown widely scattered and about 0.3 mm across. Volcanic rock fragments (<5%) are angular and up to 0.5 mm across. They contain plagioclase laths, opaques and altered glass. Red brown clay clasts up to 1 mm across contain small crystals of plagioclase and iron oxide. Rounded iron oxide grains make tp less than 2% of the sherd. The clay is red brown.

IL_2_26

Sio style. CAUTION: Section less than 30microns. Pyroxene crystals are generally 0.5 mm in length and make up about 10% of the sherd. Altered volcanic rock fragments 5% are up to 0.5 mm in length and contain plagioclase laths, altered glass and mafic minerals. There are some red ferruginized clasts, the brown clay also contains small amounts of fine quartz and feldspar.

IL_2_39

Sio style. CAUTION: Section less than 30microns. Pyroxene crystals (<5%) are generally 0.2 mm in length and there are some large ones up to 0.5 mm in length. There is some altered volcanic rock fragments up to 0.5 mm in length, contain thin plagioclase crystals and yellow brown altered glass. Opaque minerals (5%) are less than 0.2 mm in length. There are some red ferruginized clasts up to 0.4 m in length and brown ferruginized clay clasts up to 0.1 mm in diameter. The clay is a pale brown.

IL_2_36

Madang style. CAUTION: Section less than 30microns. Angular quartz and feldspar grains (about 10%), Minor pyroxene grains are all <0.2 mm in length. There are some minor volcanic rock fragments which contain plagioclase, iron oxides and altered glass. Opaque minerals range in size from 0.1 to 0.5 mm in length, and there is less than 5% of those. The clay is red brown.

JS_1_36

Type X sherd. Grog B. Contains subordinate ferruginous grains. KAM F/TIM.33 Open site. Body.

IL_1_95

CAUTION: Section less than 30microns. Nambariwa clay. Consists of shelly fragments (more than 50%) of different sizes up to 2 mm. Some of the fragments show excellent cellular structure indicating the presence of coral, gastropods and bivalves. Other shelly fragments consist of very fine grained carbonate. Pyroxene grains (<5%) are colourless, angular and less than 0.2 mm across. There is a trace of spinel, minor angular feldspar (less than 0.2 mm across) and brown clay.

JS_1_19

Red slipped sherd with everted rim. Calcareous fabric.

JS_1_20

Everted rim, plain sherd. Calcareous fabric.

JS_1_21

Everted notched rim sherd with punctate and incised decoration.

JS_1_22

Punctated with relief bands. Micaceous

JS_1_23

Everted flat lip. Plain sherd.

JS_1_24

None

JS_1_25

Adzera-type comb and incised decoration

JS_1_26

Everted flat lip with notched interior rim.

JS_1_28

Everted, flat and notched rim. Calcareous reef debris fabric

JS_1_27

Round and thickened rim. Incised and relief decoration.

JS_1_29

Everted, flat rim sherd. Quartz, amphibole and feldspar fabric.

JS_1_30

Pointed, punctate and incised rim. Amphibole, quartz, calcareous, plutonite rocks and opaques.

JS_1_31

Flat rim, incised and punctate sherd.

JS_1_32

Round rim, relief bands on sherd.

JS_1_33

Relief with notched bands

JS_1_34

Humus rich clay

JS_1_35

None

JS_2_1_a

Type X sherd. Possibly grog tempered.

JS_2_1_b

Type F.

JS_2_2_a

Type C.

JS_2_2_b

Na

JS_2_3_a

Na

JS_2_3_b

Na

JS_2_4_a

Na

JS_2_4_b

Na

JS_2_5_a

Na

JS_2_5_b

Na

References:

Prehistoric exchange in the Vitiaz Strait, Papua New Guinea (Lilley, I.)

224, Siassi, Huon PNG (Dickinson, W.)

Temper Sands in Prehistoric Oceanian Pottery (Dickinson, W.)

Type X Pottery, Morobe Province, Papua New Guinea: Petrography and Possible Micronesian Relationship (Specht, Lilley, Dickinson)

011 Mariana 1966 (Dickinson, W.)