# Juan de Fuca Ridge Sediment Physical Property Data over the last 700,000 Years
#-----------------------------------------------------------------------
#               World Data Center for Paleoclimatology, Boulder
#                                   and
#                      NOAA Paleoclimatology Program
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# NOTE: Please cite original publication, online resource and date accessed when using this data.
# If there is no publication information, please cite Investigator, title, online resource and date accessed.
#
# Description/Documentation lines begin with #
# Data lines have no #
#
# Online_Resource: https://www.ncdc.noaa.gov/paleo/study/20408
# Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/costa2016/costa2016-35pc-coarse.txt
#
# Archive: Paleoceanography
#
# Parameter_Keywords: age control, magnetic susceptibility, oxygen isotopes, physical properties
#---------------------------------------
# Contribution_Date
#    Date: 2016-08-15
#---------------------------------------
# Title
#    Study_Name: Juan de Fuca Ridge Sediment Physical Property Data over the last 700,000 Years
#---------------------------------------
# Investigators
#      Investigators: Costa, K.M.; McManus, J.F.; Boulahanis, B.; Carbotte, S.M.; Winckler, G.; Huybers,P.J.; Langmuir, C.H.
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# Description and Notes
#        Description: 
#---------------------------------------
# Publication
# Authors: Costa, K.M., J.F. McManus, B. Boulahanis, S.M. Carbotte, G. Winckler, P.J. Huybers, and C.H. Langmuir
# Published_Date_or_Year: 2016
# Published_Title: Sedimentation, stratigraphy and physical properties of sediment on the Juan de Fuca Ridge
# Journal_Name: Marine Geology
# Volume: in press
# Edition: 
# Issue: 
# Pages: 
# Report Number: 
# DOI: 10.1016/j.margeo.2016.08.003
# Online_Resource: 
# Full_Citation: 
# Abstract: Sedimentation near mid-ocean ridges may differ from pelagic sedimentation due to the influence of the ridges' rough topography on sediment deposition and transport. This study explores whether the near-ridge environment responds to glacial-interglacial changes in climate and oceanography. New benthic d18O, radiocarbon, multi-sensor track, and phys- ical property (sedimentation rates, density, magnetic susceptibility) data for seven cores on the Juan de Fuca Ridge pro- vide multiple records covering the past 700,000 years of oceanographic history of the Northeast Pacific Ocean. System- atic variations in sediment density and coarse fraction correspond to glacial-interglacial cycles identified in benthic d18O, and these observations may provide a framework for mapping the d18O chronostratigraphy via sediment density to other locations on the Juan de Fuca Ridge and beyond. Sedimentation rates generally range from 0.5 to 3 cm/kyr, with back- ground pelagic sedimentation rates close to 1 cm/kyr. Variability in sedimentation rates close to the ridge likely reflects remobilization of sediment caused by the high relief of the ridge bathymetry. Sedimentation patterns primarily reflect di- vergence of sedimentation rates with distance from the ridge axis and glacial-interglacial variation in sedimentation that may reflect carbonate preservation cycles as well as preferential remobilization of fine material.
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# Funding_Agency
#    Funding_Agency_Name: NSF
#    Grant: AGS-1338832
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# Site Information
# Site_Name: AT26-19 35PC
# Location: North Pacific
# Country: 
# Northernmost_Latitude: 44.99118
# Southernmost_Latitude: 44.99118
# Easternmost_Longitude: 130.45737
# Westernmost_Longitude: 130.45737
# Elevation: -2731
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# Data_Collection
#   Collection_Name: 35PC Coarse Costa16
#   First_Year: 309740
#   Last_Year: 6590
#   Time_Unit: cal yr BP
#   Core_Length: 
#   Notes: 
#---------------------------------------
# Chronology_Information 
# Chronology: 
#---------------------------------------
# Variables
# Data variables follow that are preceded by "##" in columns one and two.
# Variables list, one per line, shortname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data)
## depth_cm	depth,,,cm,,,,,N
## age_calkaBP	age,,,calendar ka BP,,,,,N
## coarse%	coarse fraction,sediment,,weight percent,,paleoceanography,>63um,,N
#------------------------
# Data
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing Value: NaN
depth_cm	age_calkaBP	coarse%	
0.5	6.59	0.6	
12.5	13.44	6.2	
20.5	18.01	19.0	
28.5	22.58	22.4	
36.5	27.14	11.2	
48.5	33.99	15.2	
68.5	45.40	15.3	
76.5	49.97	16.0	
96.5	61.39	13.9	
116.5	72.80	12.5	
136.5	84.21	0.4	
168.5	96.73	0.6	
200.5	104.96	0.2	
220.5	110.11	0.3	
240.5	115.25	1.7	
287.7	127.40	1.3	
299.7	130.48	5.4	
311.7	138.78	34.8	
315.7	141.93	35.7	
323.7	148.25	33.7	
335.7	157.72	28.5	
347.7	167.19	27.8	
367.7	175.94	21.2	
391.7	185.36	3.6	
415.7	194.78	0.6	
447.3	207.17	0.0	
459.3	211.88	0.0	
491.3	228.48	2.4	
507.3	236.46	0.6	
529.3	249.01	0.6	
531.3	251.72	9.7	
535.3	256.11	10.8	
539.3	260.49	8.4	
547.3	269.25	6.9	
605.5	281.48	0.6	
613.5	288.55	0.9	
621.5	295.61	1.7	
625.5	299.14	3.1	
629.5	302.67	4.1	
637.5	309.74	3.6