Dendrochronology (completed by I Panyushkina)
IntCal19

a) Sample identifier (Dendro-Lab Key-code): #BCL-01
Lab of Tree-Ring Research Archive and Collections, University of Arizona
b) Sample certainly derives from a single tree (Y/N): Y
c) Site: Birch Creek site in the White Mountains, California
3050m asl 37° 23' 9" N 118° 10' 28" W
d) Object type: Remnant log
e) Preservation: excellent, weathered edges
f) Sample type (e.g. core or slice): cross-section
g) Species: Pinus longaeva
h) No of rings: specimen with 635 rings for the interval -4935 to -4300
i) Pith (Y/N): N
j) Waney edge: N
k) Bark (Y/N): N
l) Sapwood (Y/N): N
m) Methodology used for dating:
The calendar age of the rings was determined with two cross-dating approaches: skeleton plotting and correlation of tree-ring width measurements. Originally the collected specimen was crossdated with skeleton plotting by C.W. Ferguson in 1971, and archived at the LTRR. The specimen’s surface has prick points for the decadal ring count and written dates (see photo below). For Miyake et al 2017 study we measured tree-ring widths for the interval -4800 to – 4599 astronomical BC years (Zero Year included) and cut off a wood block near the measuring line. ID of TRW series is BCL01. The series of measured tree-ring widths (202 yrs) was cross-dated with the Methuselah Walk chronology of Bristlecone Pine (INTRDB file ca535.rwl Span -6000-1979 submitted by D. A. Graybill). The dating was verified with Person correlation in COFECHA program. Correlation with master is 0.75.

COFECHA output file is BCL01 COF.out (position #1 in the list of cofecha series)
n) Dated individually (Y/N): Y
The specimen was collected in 1971 and originally dated by C.W. Ferguson with skeleton plotting. For Miyake et al. 2017 study, the dating was confirmed by C. Baisan and I. Panyushkina with tree-ring measurements. F. Miyake separated the rings.
o) Raw ring width series attached
Publicly deposited (Y/N): No
p) Remainder of sample is stored in which archive?
LTRR, University of Arizona, Tucson, USA

Location updated 2022 by IP

Dendrochronology (completed by I Panyushkina)
IntCal19

a) Sample identifier (Dendro-Lab Key-code): 1977-201C
Lab of Tree-Ring Research Archive and Collections, University of Arizona
b) Sample certainly derives from a single tree (Y/N): Y
c) Site: Coldwater Spring site in the White Mountains, California
3150m 37° 24' 25" N 118° 10' 22" W
d) Object type: Remnant log
e) Preservation: excellent, weathered edges
f) Sample type (e.g. core or slice): cross-section
g) Species: Pinus longaeva
h) No of rings: 320 rings for the interval - 4470 to -4150.
i) Pith (Y/N): N
j) Waney edge: N
k) Bark (Y/N): N
l) Sapwood (Y/N): N
m) Methodology used for dating: The calendar age of the rings was determined with two cross-dating approaches: skeleton plotting and correlation of tree-ring width measurements. Originally the collected specimen was crossdated with skeleton plotting by C.W. Ferguson in 1977, and archived at the LTRR. The specimen dates are between - 4470 and -4150. The specimen’s surface has written dates (see photo below). For Miyake et al 2017 study we measured tree-ring widths for the interval -4470 to – 4250 astronomical years (Year Zero included) and cut off a wood block near the measuring line. ID of TRW series is 77-201c. The series of measured tree-ring widths (221 yrs) was cross-dated with the Methuselah Walk chronology of Bristlecone Pine (INTRDB file ca535.rwl Span -6000-1979 submitted by D. A. Graybill). The dating was verified with Person correlation in COFECHA program. Correlation with master is 0.55. COFECHA output file is 77-201c COF.out (position #1 in the list of cofecha series).
n) Dated individually (Y/N): Y
The specimen was collected in 1977 and originally dated by C.W. Ferguson. For Miyake et al. 2017 study, the dating was confirmed by C. Baisan and I. Panyushkina. F. Miyake separated the rings.
o) Raw ring width series attached
Publicly deposited (Y/N): No
p) Remainder of sample is stored in which archive?
LTRR, University of Arizona, Tucson, USA

Location updated 2022 IP

Dendrochronology (completed by I. Panyushkina)
IntCal19

a) Sample identifier (Dendro-Lab Key-code): 1971#059
Lab of Tree-Ring Research Archive and Collections, University of Arizona
b) Sample certainly derives from a single tree (Y/N): Y
c) Site: Methuselah Walk site (MW) in the White Mountains, California
37° 22' 45.84'' N; 118° 9' 55.44'' W; 3350 m asl
d) Object type: Remnant log
e) Preservation: excellent, weathered edges
f) Sample type (e.g. core or slice): cross-section
g) Species: Pinus longaeva
h) No of rings: 503
i) Pith (Y/N): N
j) Waney edge: N
k) Bark (Y/N): N
l) Sapwood (Y/N): N
m) Methodology used for dating:
n) The calendar age of the rings was determined with two cross-dating approaches: skeleton plotting and correlation of tree-ring width measurements. Originally the collected specimen was crossdated with skeleton plotting by C.W. Ferguson in 1971, and archived at the LTRR. The specimen’s surface has prick points for the decadal ring count and written dates in astronomical years. Digital catalog of LTRR Collection has records of this specimen as 71#59 and 1971#059. Later the ring widths of this specimen were measured and included into the Methuselah Walk chronology of Bristlecone Pine (LaMarche and Harlan 1973). The ID of this TRW series is #995924 for the period -5924-5422 (503 yrs). See below a copy of COFECHA output with correlation table between this series and the Methuselah Walk master chronology.
For the 14C study, we made new measurements of tree-ring widths for the interval -5559-5371 astronomical years (189 yrs) to confirm the crossdates of rings to be sampled. ID of this TRW series is # 71-59 (see attached 197159 data). A wooden bock was cut from the specimen following the measuring line (see photo at the next page). The sampled specimen was placed back to the archive.
o) Correlation of series #995924 with MW master (LaMarche and Harlan 1973) is 0.69. See line for series # 330
p) Dated individually (Y/N): Y
Cross-dating Steps:
In 2016 for the purpose of 5480 BC excursion study (Miyake et al. 2017, PNAS), C. Baisan and M. Salzer confirmed the dating to be dissected rings with new ring width measurements (C. Baisan) for the interval from -5559 to -5371 (189 yrs). The new measurements were correlated with the Methuselah Walk master chronology. I. Panyushkina supervised the ring cutting and re-checked the target interval dates with the MW master record.
The dates are given in astronomical years. The TRW series includes the Zero Year.
q) Raw ring width series: #197159 series with span -5559 to -5371 (189 yrs) astronomical yrs.
Attached files:
MW 1971-59cof.out - COFECHA output for series #197159 and MW master chronology ca535.rwl (see series #197159 at the position #1). Correlation with the master is 0.67.
MW 1971-59.rwl -File of cross-dated measurements.
Publicly deposited (Y/N): No
Summary of cross-dating history: Wood specimen ID is #71-59 or 1971#59. Tree-ring width series ID is #995924 in the Methuselah Walk master chronology (LaMarche and Harlan 1973), and #197159 series in the 5480 BC excursion study.
p) Remainder of sample is stored in which archive?
LTRR, University of Arizona, Tucson, USA