Guangalan Fineware Niki Apollonia Buechel, Sabrina Rose Casavechia, - - PowerPoint PPT Presentation

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Guangalan Fineware Niki Apollonia Buechel, Sabrina Rose Casavechia, - - PowerPoint PPT Presentation

Dec 10, 2022 128 likes •364 views

Uncovering the Mystery of Guangalan Fineware Niki Apollonia Buechel, Sabrina Rose Casavechia, Matthew Christopher Guido, Gabrielle Hoang, Abhiram Karuppur, Sangho Andrew Lee, Heather Amelia Newman, Dorothy Yingtao Qu Introduction Guangala o

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SLIDE 1

Uncovering the Mystery of Guangalan Fineware

Niki Apollonia Buechel, Sabrina Rose Casavechia, Matthew Christopher Guido, Gabrielle Hoang, Abhiram Karuppur, Sangho Andrew Lee, Heather Amelia Newman, Dorothy Yingtao Qu

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SLIDE 2

Introduction

  • Guangala
  • People of Southwest Ecuador
  • Not much is known
  • Known for ceramic fineware
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SLIDE 3

Introduction

  • Mystery of their Ceramics
  • Contains Pumice
  • How was it obtained?
  • Significance
  • New info about Guangala
  • Develop archaeological

methods

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SLIDE 4

Terms to Know

  • Properties of clay
  • Interaction of

temper

  • Use of Pumaceous

Ash

  • Phenocrysts

Ashfall; 100X; ppl; 1.2 mm Ashfall; 100X; xpl; 1.2 mm

Phenocrysts

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SLIDE 5

Examples of Guangalan Pottery

Somberware Bichrome Polychrome

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SLIDE 6

Geology

  • El Azucar Valley -

Sedimentary

  • Chongon-Colonche

Hills - Igneous

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SLIDE 7

Geology

  • The Andes
  • Andean volcanic belt

supplies ash and pumice

  • Closest deposit 250 km

from El Azucar

http://www.geodyssey.co.uk/ecuador/_images/maps/ecuador_map_100c .gif

El Azucar

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SLIDE 8

Comparative Cases

  • Provenance study on ash in Lowland Classic Maya ceramics
  • Temper: glass shards vs. pumaceous volcaniclastic materials
  • Anabel Ford’s research
  • Ashfall hypothesis
  • Weaknesses

10x 2mm field of view 40x 0.2 mm field of view

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SLIDE 9

Technology and Economy

  • Agricultural-based with fishing,

hunting

  • Gradual increase in trade

complexity

  • Evidence of trade
  • Obsidian
  • Salt
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SLIDE 10

Hypothesis

  • Pumice was traded from

highlands

  • Use ceramic petrography

to test our theory

  • Thin sections are taken of samples
  • Polarizing light microscope provides

insight into mineralogical and material makeup

  • Allows pottery to be examined as a

geological material

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SLIDE 11

Materials and Methods

  • Goal: determine source of

pumice Procedural Steps

  • Created experimental

ceramics with known pumice and pumice-like inclusions

  • Fired briquettes with 8

different materials

  • Sent to lab to be made into

thin sections for analysis

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SLIDE 12

Materials and Methods

  • Selected 9 representative

Guangala archaeological samples (3 sombreware, 3 bichrome, 3 polychrome)

  • Analyzed thin sections of

each under petrographic microscope

  • Identified phenocrysts in

pumice

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SLIDE 13

Pumice

100X; 1.2 mm

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SLIDE 14

Materials and Methods

  • Documented appearance,

shape, size, density, and phenocryst presence/absence

  • Compositional analysis
  • Compared to attributes of

pumice inclusions in archaeological samples

○ Raw materials ○ Test tempers in experimental briquettes ○ Ashfall

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SLIDE 15

Archaeological Samples

  • Small and

frequent

  • Subangular

and subrounded inclusions

  • 100x; ppl;

1.2mm

Archaeological Sample; 100X; ppl; 1.2 mm

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SLIDE 16

Results

  • Control-

industrial clay

  • No pumice

inclusions

  • 100x; ppl;

1.2mm

Control; 100X; ppl; 1.2 mm

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SLIDE 17

Results

Ashfall Pumice

Ashfall; 100X; ppl; 1.2 mm C97-3; 100X; ppl; 1.2 mm

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SLIDE 18

Results

  • Experimental Sample with Ashfall had no

trace of pumice

  • Other samples confirmed presence of

pumice

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SLIDE 19

Discussion

  • Absence of pumice in

experimental sample containing ashfall

  • Consistent physical

properties of archaeological sample pumice

  • Cotopaxi National Park

experimental sample a close match

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SLIDE 20

Conclusion

  • Ashfall hypothesis

unsupported

  • Likely that pumice was

traded

  • Further studies should

improve on:

○ Migration of people ■ Assimilation of cultures: Guangalan pottery-making ■ Transportation of pumice and obsidian

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SLIDE 21

Acknowledgements

We would like to thank: Independent College Fund of NJ/Johnson & Johnson AT&T Actavis Pharmaceuticals Bayer Healthcare Celgene Novartis Laura (NJGSS ’86) and John Overdeck NJGSS Alumnae and Parents of Alumnae Board of Overseers, New Jersey Governor’s Schools State of New Jersey Drew University

  • Dr. Maria Masucci
  • Dr. Adam Cassano
  • Dr. Steve Surace

Anna Mae Dinio-Bloch

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SLIDE 22

References

Google Maps-https://www.google.com/maps/place/Az%C3%BAcar,+Ecuador/@-2.2333266,- 80.6705318,47623m/data=!3m1!1e3!4m2!3m1!1s0x902dee4850331017:0x4ded5c1e08485fdb Polychrome pot- (http://luckyjor.org/intersito/cultura/figguangala3.jpg) Timeline- http://www.precolombino.cl/images/lineas-de-tiempo/intermedia/42.gif Ford Pots- http://www.marc.ucsb.edu/sites/www.marc.ucsb.edu/files/news_images/volc%20ash.png Volcano- http://static2.egu.eu/media/filer_public_thumbnails/filer_public/2012/07/14/karymsky- 3c438e544cb046916800fcbd69724d0f.jpg__1280x99999_q85_subject_location- 1568,1061_subsampling-2.jpg Fedex- http://blog.pixellogo.com/wp-content/uploads/2010/07/federal-express-truck.jpg Microscope- http://www.geosci.ipfw.edu/sem/pics/petrographicmicroscope.jpg The Andes- http://www.geodyssey.co.uk/ecuador/_images/maps/ecuador_map_100c.gif Obsidian- http://www.ablogabouthistory.com/wp-content/uploads/2012/09/obsidian.jpg Phenocrysts-https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcSrof9DYsl9jjZc-8- q2Mda9jLFAhDNSKmf8Fp6wxWGso3D7PXv9A Ford’s Powerpoint Ashfall-https://feww.files.wordpress.com/2013/08/sakurajima-dumps-ash-on-kagoshima-city.jpg