An Atlas of Paste Fabrics and Supplemental Paste Compositional

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1 Contents lists available at ScienceDirect 2 3 4 Data in Brief 5 6 7 journal homepage: www.elsevier.com/locate/dib 8 9 Data Article 10 11 12 An atlas of paste fabrics and supplemental paste 13 compositional data from late middle 14 15 preclassic-period ceramics at the Maya site 16 17 of Holtun, Guatemala 18 a,n b a 19 Michael G. Callaghan , Daniel Pierce , Brigitte Kovacevich , b 20 Q1 Michael D. Glascock 21 Q2 a University of Central Florida, USA 22 b Research Reactor, University of Missouri, USA 23 24 25 article info abstract 26 27 Article history: This data article contains an atlas of paste fabrics and supple- 28 Received 31 January 2017 mental paste compositional data generated from Late Middle 29 Received in revised form Preclassic-period ceramics at the Maya site of Holtun, Guatemala. 30 28 February 2017 The data include maps showing locations of archeological contexts, Accepted 9 March 2017 31 excavation profiles, photographs and photomicrographs of sherds 32 and paste fabrics, and compositional data produced by Neutron Q3 Keywords: 33 Activation Analysis (NAA) at the Research Reactor, University of Maya Missouri (MURR). The NAA data include a biplot and table of 34 Archeology canonical discriminant analyses, Mahalonobis distance calcula- 35 Middle Preclassic tions, and Euclidian distance searches between the samples. 36 Ceramics & 2017 The Authors. Published by Elsevier Inc. This is an open 37 Neutron Activation Analysis Microscopy access article under the CC BY license 38 Craft production (http://creativecommons.org/licenses/by/4.0/). 39 40 41 42 Specifications Table 43 44 Subject area Archaeology 45 More specific Archaeometry 46 subject area 47 48 49 DOI of original article: http://dx.doi.org/10.1016/j.jasrep.2017.01.040 50 n Corresponding author. 51 E-mail address: [email protected] (M.G. Callaghan). 52 http://dx.doi.org/10.1016/j.dib.2017.03.024 53 2352-3409/& 2017 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license 54 (http://creativecommons.org/licenses/by/4.0/).

Please cite this article as: M.G. Callaghan, et al., An atlas of paste fabrics and supplemental paste compositional data from late middle preclassic-period ceramics at the Maya site of Holtun, Guatemala, Data in Brief (2017), http://dx.doi.org/10.1016/j.dib.2017.03.024i 2 M.G. Callaghan et al. / Data in Brief ∎ (∎∎∎∎) ∎∎∎–∎∎∎

55 Type of data Maps, tables, charts, photographs, photomicrographs 56 How data was Digital microscope (Dinolite AMZ750), Neutron Activation Analysis, statistical 57 acquired analysis 58 Data format Raw and analyzed 59 Experimental Sherds were cleaned, dried, and crushed into powder for NAA 60 factors 61 Experimental Mineralogical and elemental analysis of paste composition 62 features 63 Data source Archaeological site of Holtun, Department of Peten, Guatemala and MURR 64 location 65 Data accessibility Data is with this article 66 Related research 2017, Callaghan, Michael G., Daniel Pierce, Brigitte Kovacevich, and Michael 67 article D. Glascock. “Chemical Paste Characterization of Late Middle Preclassic-Period 68 Ceramics from Holtun, Guatemala and its Implications for Production and 69 Exchange”. Journal of Archaeological Science Reports 12:334-345. 70 71 Value of the data 72 73 Data presented here represent a standard for chemical paste compositional analysis of arche- 74 ological ceramic material using Neutron Activation Analysis (NAA). 75 These data are a benchmark for paste compositional analysis of Late Middle Preclassic-period 76 ceramics in the Maya lowlands. 77 These data include the ﬁrst published atlas of paste fabrics for Middle Preclassic Maya ceramics. 78 These data can be compared to compositional data from other Maya sites to identify clay pro- 79 curement zones, centers of ceramic production, and exchange networks during the Late Middle 80 Preclassic through Postclassic periods. 81 These data can be compared to similar data from other world regions in an effort to reconstruct 82 patterns of production and exchange in early states. 83 84 85 1. Data 86 87 These data include a map showing the location of Holtun in Guatemala and its relation to 88 neighboring sites (Fig. 1), maps of the site showing the location of groups cited in this study (Fig. 2), 89 maps of the locations of excavation units within the patios where samples were found (Figs. 3 and 5), 90 proﬁles of excavations showing stratigraphy of excavation units where samples were found 91 (Figs. 4 and 6), photographs of sherds and an atlas of paste fabrics with corresponding table of type: 92 varieties (Appendix A), and compositional data produced by Neutron Activation Analysis (NAA) at the 93 Research Reactor, University of Missouri (MURR). The NAA data include a table of Mahalonobis dis- 94 tance calculations of elemental concentrations between samples (Table 1), a chart and table of 95 canonical discriminant analyses of paste groups and elemental concentrations (Fig. 7 and Table 2), 96 and a chart of a log-based Euclidian distance search between the samples (Fig. 8). The data also 97 include results of Chi-Square tests of association between paste chemical composition groups and 98 99 ceramic attributes including type: variety, group, ware, temper, decoration, and form (Appendix B). 100 101 102 2. Experimental design, materials and methods 103 104 2.1. Study area 105 106 The materials for this study consisted of 97 samples of archeological ceramics from eight contexts 107 dating to the Late Middle Preclassic-period at the Maya site of Holtun, Guatemala [6]. The arche- 108 ological site of Holtun is an intermediate sized civic-ceremonial center with documented occupation

Please cite this article as: M.G. Callaghan, et al., An atlas of paste fabrics and supplemental paste compositional data from late middle preclassic-period ceramics at the Maya site of Holtun, Guatemala, Data in Brief (2017), http://dx.doi.org/10.1016/j.dib.2017.03.024i M.G. Callaghan et al. / Data in Brief ∎ (∎∎∎∎) ∎∎∎–∎∎∎ 3

109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 Fig. 1. Map of Lake Yaxha Area, Guatemala showing location of the site of Holtun in relation to other sites (map by Rodrigo 159 Guzman). 160 161 162

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163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 Fig. 2. Map of Holtun, Guatemala (map by Rodrigo Guzman). 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 Fig. 3. Map of Group F, Patio A with location of excavation units including HTN 1-1 (map by Rodrigo Guzman).

Please cite this article as: M.G. Callaghan, et al., An atlas of paste fabrics and supplemental paste compositional data from late middle preclassic-period ceramics at the Maya site of Holtun, Guatemala, Data in Brief (2017), http://dx.doi.org/10.1016/j.dib.2017.03.024i M.G. Callaghan et al. / Data in Brief ∎ (∎∎∎∎) ∎∎∎–∎∎∎ 5

217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 Fig. 4. Proﬁle of excavation unit HTN 1-1 (drawing by Patricia Rivera Castillo). 268 269 270

Please cite this article as: M.G. Callaghan, et al., An atlas of paste fabrics and supplemental paste compositional data from late middle preclassic-period ceramics at the Maya site of Holtun, Guatemala, Data in Brief (2017), http://dx.doi.org/10.1016/j.dib.2017.03.024i 6 M.G. Callaghan et al. / Data in Brief ∎ (∎∎∎∎) ∎∎∎–∎∎∎

271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 Fig. 5. Map of Group F, Patio C with location of excavation units including HTN 3-3 (map by Rodrigo Guzman). 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 Fig. 6. Proﬁle of excavation unit HTN 3-1 (drawing by Juan Saravia).

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325 Table 1 326 Mahalonobis distance calculations for each identiﬁed group. 327 Membership probabilities(%) for samples in Group: unassign 328 329 Probabilities calculated by projecting unknowns against reference Groups. 330 ANID Group 1 Group 2 Group 3 Group 4 Best Group 331 332 HTN002 0.000 18.076 34.374 0.344 Group 3 333 HTN003 0.000 4.308 87.639 0.633 Group 3 334 HTN038 0.000 5.096 32.951 2.203 Group 3 HTN068 0.000 0.138 3.548 19.799 Group 4 335 HTN069 0.000 0.108 3.291 25.457 Group 4 336 HTN082g 0.000 0.001 0.002 7.465 Group 4 337 HTN082r 0.000 3.314 99.872 0.158 Group 3 338 HTN085 0.000 13.100 66.881 0.189 Group 3 339 Membership probabilities(%) for samples in Group: Group 1

340 HTN004 72.337 2.073 0.014 0.000 Group 1 341 HTN020 51.099 2.529 0.009 0.000 Group 1 342 HTN021 65.876 1.894 0.008 0.000 Group 1 343 HTN022 34.040 2.239 0.034 0.000 Group 1 HTN031 46.706 2.484 0.033 0.000 Group 1 344 HTN032 60.626 1.875 0.012 0.000 Group 1 345 HTN034 70.936 1.958 0.011 0.000 Group 1 346 HTN035 18.186 1.192 0.005 0.000 Group 1 347 HTN058 15.092 3.861 0.092 0.000 Group 1 348 HTN059 72.621 2.223 0.018 0.000 Group 1 HTN083 80.221 2.109 0.012 0.000 Group 1 349 HTN084 97.824 2.549 0.015 0.000 Group 1 350 HTN086 7.526 1.846 0.004 0.000 Group 1 351 HTN087 9.063 5.153 0.022 0.000 Group 1 352 HTN088 59.296 4.184 0.040 0.000 Group 1 HTN089 22.226 4.960 0.077 0.000 Group 1 353 HTN090 93.895 3.232 0.022 0.000 Group 1 354 HTN091 77.800 3.206 0.016 0.000 Group 1 355 HTN092 56.667 1.851 0.012 0.000 Group 1 356 HTN093 42.797 1.765 0.006 0.000 Group 1 357 HTN094 76.728 3.781 0.026 0.000 Group 1 HTN095 61.522 4.098 0.039 0.000 Group 1 358 359 Membership probabilities(%) for samples in Group: Group 2 360 HTN030 0.000 13.599 42.838 0.003 Group 3 361 HTN046 0.000 76.793 2.285 0.000 Group 2 362 HTN047 0.000 89.429 1.647 0.001 Group 2 HTN072 0.000 75.981 7.595 0.001 Group 2 363 HTN073 0.000 51.344 0.416 0.000 Group 2 364 HTN074 0.000 98.935 3.131 0.002 Group 2 365 HTN075 0.000 58.209 6.176 0.000 Group 2 366 HTN076 0.000 55.926 0.636 0.002 Group 2 HTN077 0.000 32.025 3.978 0.086 Group 2 367 HTN078 0.000 92.504 4.946 0.007 Group 2 368 HTN079 0.000 43.874 0.319 0.000 Group 2 369 HTN081 0.000 19.301 8.903 0.306 Group 2 370 Membership probabilities(%) for samples in Group: Group 3 371 HTN008 0.000 0.993 56.213 5.942 Group 3 372 HTN010 0.000 1.756 94.733 0.349 Group 3 373 HTN014 0.000 0.444 41.650 9.379 Group 3 374 HTN016 0.000 0.839 59.081 4.960 Group 3 375 HTN018 0.000 1.690 81.582 0.032 Group 3 376 HTN025 0.000 0.709 55.327 0.016 Group 3 HTN026 0.000 0.159 24.795 2.901 Group 3 377 HTN027 0.000 0.995 15.568 0.000 Group 3 378

Please cite this article as: M.G. Callaghan, et al., An atlas of paste fabrics and supplemental paste compositional data from late middle preclassic-period ceramics at the Maya site of Holtun, Guatemala, Data in Brief (2017), http://dx.doi.org/10.1016/j.dib.2017.03.024i 8 M.G. Callaghan et al. / Data in Brief ∎ (∎∎∎∎) ∎∎∎–∎∎∎

379 Table 1 (continued ) 380 381 Membership probabilities(%) for samples in Group: unassign 382 Probabilities calculated by projecting unknowns against reference Groups. 383 ANID Group 1 Group 2 Group 3 Group 4 Best Group 384 385 HTN028 0.000 0.883 14.346 0.000 Group 3 386 HTN029 0.000 2.114 77.451 1.963 Group 3 387 HTN036 0.000 29.981 23.529 0.162 Group 2 388 HTN039 0.000 0.974 81.168 0.443 Group 3 HTN040 0.000 27.863 22.109 0.193 Group 2 389 HTN041 0.000 9.931 81.641 0.114 Group 3 390 HTN049 0.000 0.320 45.197 0.828 Group 3 391 HTN051 0.000 10.461 6.393 0.000 Group 2 392 HTN052 0.000 2.042 89.812 0.944 Group 3 HTN053 0.000 0.793 40.838 0.002 Group 3 393 HTN054 0.000 0.561 52.464 5.229 Group 3 394 HTN055 0.000 33.757 15.293 0.143 Group 2 395 HTN056 0.000 1.225 73.307 2.539 Group 3 396 HTN057 0.000 0.969 45.858 0.003 Group 3 397 HTN062 0.000 2.900 97.410 0.090 Group 3 HTN063 0.000 22.397 20.604 0.292 Group 2 398 HTN067 0.000 4.045 95.101 0.392 Group 3 399 HTN070 0.000 2.588 77.243 1.742 Group 3 400 Membership probabilities(%) for samples in Group: Group 4 401 402 HTN001 0.000 0.048 2.350 60.457 Group 4 HTN005 0.000 0.069 3.594 57.395 Group 4 403 HTN006 0.000 0.004 0.053 63.313 Group 4 404 HTN007 0.000 0.002 0.024 47.950 Group 4 405 HTN009 0.000 0.130 4.027 25.692 Group 4 406 HTN011 0.000 0.000 0.001 15.006 Group 4 HTN012 0.000 0.044 2.343 69.313 Group 4 407 HTN013 0.000 0.090 9.873 37.788 Group 4 408 HTN015 0.000 0.004 0.083 80.786 Group 4 409 HTN017 0.000 0.010 0.426 88.804 Group 4 410 HTN019 0.000 0.009 0.356 90.987 Group 4 411 HTN023 0.000 0.043 4.253 48.542 Group 4 HTN024 0.000 0.362 12.228 23.390 Group 4 412 HTN033 0.000 0.008 0.289 69.942 Group 4 413 HTN037 0.000 0.011 0.484 88.236 Group 4 414 HTN042 0.000 0.005 0.121 54.943 Group 4 415 HTN043 0.000 0.008 0.389 40.913 Group 4 HTN044 0.000 0.001 0.003 29.583 Group 4 416 HTN045 0.000 0.042 4.024 52.175 Group 4 417 HTN048 0.000 0.000 0.001 13.091 Group 4 418 HTN050 0.000 0.003 0.067 48.924 Group 4 419 HTN060 0.000 0.004 0.085 42.828 Group 4 420 HTN061 0.000 0.002 0.023 60.845 Group 4 HTN064 0.000 0.265 25.529 20.622 Group 3 421 HTN065 0.000 0.014 0.769 77.593 Group 4 422 HTN066 0.000 0.077 6.668 60.375 Group 4 423 HTN071 0.000 0.043 0.829 10.618 Group 4 424 HTN080 0.000 0.006 0.104 33.997 Group 4 425 HTN096 0.000 0.006 0.084 15.241 Group 4 HTN097 0.000 0.035 1.192 38.473 Group 4 426 427 428 429 beginning in the Late Middle Preclassic through Terminal Classic periods (600 BCE – AD 900) 430 [14,17,7–9]. The site is situated approximately 35 km southwest of Tikal and 12.3 km to the south of 431 Yaxha (Fig. 1). The formal site consists of a monumental epicenter built atop a karstic hill positioned 432 along a roughly northeast-southwest linear axis (Fig. 2). The approximate area of the epicenter is

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433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449

450 Fig. 7. Biplot of Canonical Discriminant Analysis (chart by Daniel Pierce). 451 452 970 Â 815 m. The epicenter consists of 12 main groups and 86 structures [12]. Holtun, Guatemala has 453 been the focus of investigations since 2010 [14]. 454 455 2.2. Sample 456 457 Seven of the eight contexts consisted of sealed stratified deposits located beneath a Late Middle 458 Preclassic-period plaza floor in Group F, Patio A (Figs. 3 and 4). These are sequential layers of fill 459 identified as HTN 1-1-10 through HTN 1-1-16 [14]. Four radiocarbon dates associated with contexts 460 HTN 1-1-12 through HTN 1-1-15 place these layers of deposition between 788 and 473 BCE (cali- 461 brated), which is within the established Late Middle Preclassic-period range of 600–300 BCE [4]. The 462 eighth context (HTN 3-1-6) comes from a sealed stratified deposit beneath a Late Middle Preclassic- 463 period plaster floor in Group F, Patio C (Figs. 5 and 6). While no carbon date is associated with this 464 context, stratigraphy and type: variety-mode classification of ceramics in this context indicate HTN 3- 465 1-6 is a sealed, unmixed, Late Middle Preclassic-period deposit 466 467 fi 468 2.3. Type: Variety-mode classi cation and digital photomicrographs 469 fi 470 A type: variety-mode classi cation was performed on all sherds within the eight contexts (see 471 [5,10]). Next, all samples were photographed with a Canon EOS Rebel DSLR 10 megapixel camera 472 (Appendix A). Pastes were analyzed with a Dinolite AMZ750 digital stereomicroscope with photo- fi 473 micrographs taken at 50x and 250x magni cation (Appendix A). Three wares are represented in the 474 sample. Flores Waxy Ware is the slipped serving ware tradition of red, black, and cream colors of the 475 Joventud, Chunhinta, and Pital Groups respectively. Slipped ceramics within Flores Waxy Ware also 476 included two dichrome types: namely, Muxanal Red-on-cream and Tierra Mojada Resist. Forms of 477 slipped ceramics included bowls and jars. Unslipped utilitarian ceramics belong to Uaxactun 478 Unslipped Ware and are classified within the Jocote and Achiotes Groups. Sherds of Mars Orange 479 Paste Ware were also included in the sample. Mars Orange Paste Ware is characterized by fine orange 480 paste with few to no inclusions, or volcanic ash inclusions. This ware appears in bowls, dishes, 481 and jars. 482 483 2.4. Sample preparation and NAA 484 485 Ceramic samples were prepared for NAA using procedures standard at MURR. Fragments of about 486 1cm2 were removed from each sample and abraded using a silicon carbide burr in order to remove

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487 Table 2 488 Canonical Discriminant Analysis: Canonical Discriminant Analysis of four identiﬁed source groups in the Holtun sample. 489 Element CD1 CD2 CD3 490 491 82.04534 12.38223 5.57243 492 Sm À2.41498 0.164417 À0.88161 493 Eu 1.76103 À0.43321 0.583455 494 Al 0.977728 0.331017 À0.84942 495 Hf À0.69086 À0.43159 À0.87062 496 Ti 0.804131 0.773795 0.256648 Sc À0.60128 À0.38501 0.561172 497 Lu 0.652725 0.177529 0.546106 498 Dy À0.80766 À0.19096 0.190131 499 La 0.701471 0.473308 À0.06208 500 Th 0.380362 0.137782 0.704084 Fe À0.50274 0.206254 À0.38915 501 Sb À0.05235 À0.54797 À0.29008 502 Yb À0.23533 0.274016 À0.43433 503 Ca 0.481173 0.253661 À0.0568 504 Zn À0.41997 0.175993 0.199425 À 505 Nd 0.171687 0.0996 0.207373 Cs À0.17353 0.020681 À0.18374 506 Tb À0.13697 À0.17429 À0.11571 507 As 0.049685 0.084167 0.1929 508 Cr 0.113298 À0.12899 0.120426 509 U À0.10773 0.173209 0.020955 Ta 0.117935 À0.05244 0.151552 510 Na 0.122198 0.081784 À0.13194 511 Mn 0.183093 À0.04356 0.052349 512 Zr À0.13084 0.042307 0.127145 513 V À0.06074 0.134068 À0.11214 À À 514 Ce 0.09062 0.13003 0.01066 Co 0.002246 0.123474 À0.01544 515 K À0.05889 0.072121 0.078588 516 Ba À0.01922 À0.00726 À0.06326 517 Rb À0.04245 À0.02099 À0.01691

518 Wilk's lambda: 0.000538 519 Approx. F: 20.59806 520 p‐value: 4.98E‐59 521 522 glaze, slip, paint, and adhering soil, thereby reducing the risk of measuring contamination. The 523 524 samples were washed in deionized water and allowed to dry in the laboratory. Once dry, the indi- 525 vidual sherds were ground to powder in an agate mortar to homogenize the samples. Archival 526 samples were retained from each sherd (when possible) for future research. 527 Two analytical samples were prepared from each source specimen. Portions of approximately 528 150 mg of powder were weighed into clean high-density polyethylene vials used for short irradiations 529 at MURR. At the same time, 200 mg of each sample was weighed into clean high-purity quartz vials 530 used for long irradiations. Individual sample weights were recorded to the nearest 0.01 mg using an 531 analytical balance. Both vials were sealed prior to irradiation. Along with the unknown samples, 532 Standards made from National Institute of Standards and Technology (NIST) certified standard 533 reference materials of SRM-1633a (coal fly ash) and SRM-688 (basalt rock) were similarly prepared, as 534 were quality control samples (e.g., standards treated as unknowns) of SRM-278 (obsidian rock) and 535 Ohio Red Clay (a standard developed for in-house applications). 536 Neutron activation analysis of ceramics at MURR, which consists of two irradiations and a total of 537 three gamma counts, constitutes a superset of the procedures used at most other NAA laboratories 538 [11,15,16]. As discussed in detail by Glascock [11], a short irradiation is carried out through the 539 pneumatic tube irradiation system. Samples in the polyvials are sequentially irradiated, two at a time, 540 for five seconds by a neutron flux of 8 Â 1013 ncmÀ2 sÀ1. The 720-second count yields gamma spectra

Please cite this article as: M.G. Callaghan, et al., An atlas of paste fabrics and supplemental paste compositional data from late middle preclassic-period ceramics at the Maya site of Holtun, Guatemala, Data in Brief (2017), http://dx.doi.org/10.1016/j.dib.2017.03.024i M.G. Callaghan et al. / Data in Brief ∎ (∎∎∎∎) ∎∎∎–∎∎∎ 11

541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 Fig. 8. Log of Euclidian distances between samples (chart by Daniel Pierce). 592 593 594

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595 containing peaks for nine short-lived elements aluminum (Al), barium (Ba), calcium (Ca), dysprosium 596 (Dy), potassium (K), manganese (Mn), sodium (Na), titanium (Ti), and vanadium (V). The samples are 597 encapsulated in quartz vials and are subjected to a 24–hour irradiation at a neutron flux of 598 5 Â 1013 ncmÀ2 sÀ1. This long irradiation is analogous to the single irradiation utilized at most other 599 laboratories. After the long irradiation, samples decay for seven days, and then are counted for 1800 s 600 (the "middle count") on a high-resolution germanium detector coupled to an automatic sample 601 changer. The middle count yields determinations of seven medium half-life elements, namely arsenic 602 (As), lanthanum (La), lutetium (Lu), neodymium (Nd), samarium (Sm), uranium (U), and ytterbium 603 (Yb). After an additional three- or four-week decay, a final count of 8500 s is carried out on each 604 sample. The latter measurement yields the following 17 long half-life elements: cerium (Ce), cobalt 605 (Co), chromium (Cr), cesium (Cs), europium (Eu), iron (Fe), hafnium (Hf), nickel (Ni), rubidium (Rb), 606 antimony (Sb), scandium (Sc), strontium (Sr), tantalum (Ta), terbium (Tb), thorium (Th), zinc (Zn), and 607 zirconium (Zr). The element concentration data from the three measurements are tabulated in parts 608 per million. 609 610 611 2.5. Statistical analysis of NAA data 612 613 Irradiation and gamma-ray spectroscopy followed procedures established by Glascock [11] and 614 Neff [15,16]. The interpretation of compositional data obtained from the analysis of archeological 615 materials is discussed in detail elsewhere (e.g., [1,2,3,11,13,16]). The approach used to interpret 616 chemical data for pottery involves hierarchical cluster analysis (HCA) and principal component 617 analysis (PCA) to establish initial groupings within the sample (see [6] Fig. 6). After constructing base 618 groups through HCA and PCA, bivariate plots were used to refine groups (see [6] Figs. 7–10 and 619 Table 2). Note, Strontium (Sr) and Nickel (Ni) were removed from all statistical techniques due to the 620 high number of missing values within the dataset. Next, Mahalonobis distance based probabilities 621 were calculated to assess likelihood of group membership (Table 1). A canonical discriminant analysis 622 (CDA) was then conducted using the previously identified groups (Fig. 7 and Table 2). Finally, 623 Euclidian Distance Searches (EDS) were conducted to identify the most chemically similar previously 624 analyzed samples in MURR's Mesoamerican NAA database (Fig. 8, also see [6] Table 1). 625 626 627 2.6. Chi-square tests of association 628 629 Chi-square tests of association were run between paste group and the following variables: type: 630 variety, ceramic group, ceramic ware, temper, vessel form, and decoration (Appendix B). 631 632 633 Acknowledgments 634 635 This research was funded by a National Science Foundation senior project research grant (BCS- 636 1430954) and National Science Foundation grant to the Archaeometry Laboratory at the University of 637 Missouri Research Reactor (BCS-1415403). We thank Karla J. Cardona Caravantes, Co-Director of the 638 Holtun Archeological Project, and the Instituto de Antropología e Historía (IDAEH) for facilitating 639 export of the samples used in this study. We also thank Whitney Goodwin and Rodrigo Guzman for 640 their work on sherd images and maps used in this article. We thank Shilo Bender and Aurora Blan- 641 chard for their role in preparing the samples for irradiation. 642 643 644 645 Transparency document. Supporting information 646 647 Transparency data associated with this article can be found in the online version at http://dx.doi. 648 org/10.1016/j.dib.2017.03.024.

Please cite this article as: M.G. Callaghan, et al., An atlas of paste fabrics and supplemental paste compositional data from late middle preclassic-period ceramics at the Maya site of Holtun, Guatemala, Data in Brief (2017), http://dx.doi.org/10.1016/j.dib.2017.03.024i M.G. Callaghan et al. / Data in Brief ∎ (∎∎∎∎) ∎∎∎–∎∎∎ 13

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