Core Logger Physical Properties for Palau Lakes Sediment Cores collected from small boats from September to October 2013

Data Type: Cruise Results, Other Field Results
Version: 1
Version Date: 2019-06-27

» Do Parallel Patterns Arise from Parallel Processes? (PaPaPro)

» Dimensions of Biodiversity (Dimensions of Biodiversity)
Sachs, Julian P.University of Washington (UW)Principal Investigator
Dawson, Michael N.University of California-Merced (UC Merced)Co-Principal Investigator
Rauch, ShannonWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Core Logger Physical Properties for Palau Lakes Sediment Cores collected from small boats from September to October 2013.


Spatial Extent: N:7.3218 E:134.5061 S:7.1506 W:134.3486
Temporal Extent: 2013-09-11 - 2013-10-06

Methods & Sampling

Un-split core sections were received at the National Lacustrine Core Repository (LaCore) facility and analyzed via Geotek MSCL core logger. Gamma ray attenuation density, non-contacting electrical resistivity, p-wave velocity, and magnetic susceptibility were measured via LaCore’s standard procedures. Acoustical impedance and fractional porosity are calculated properties.

Data Processing Description

There has been no data processing. This is raw data output.

BCO-DMO Processing:
- Modified parameter names (replaced spaces with underscores; renamed "Lan" to "Lat");
- replaced spaces with underscores in the "Lake_Name" and "Device" columns (to allow for sorting);
- re-formatted date to yyyy-mm-dd.

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Data Files

(Comma Separated Values (.csv), 1.65 MB)
Primary data file for dataset ID 771957

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Lake_NameLake name unitless
CoreCore name unitless
LatLatitude degrees North
LonLongitude degrees East
DeviceType of core unitless
Date_collectedDate collected; format: yyyy-mm-dd unitless
Logger_depthLogger track position meters (m)
LacCore_Section_IDLaCore section code unitless
Section_DepthDepth in section centimeters (cm)
MSCL_Sediment_ThicknessThickness of cross section centimeters (cm)
MSCL_pWave_AmplitudeUltrasonic P wave amplitude
MSCL_pWave_VelocityUltrasonic P wave velocity meters per second (m s-1)
MSCL_Gamma_DensitySediment wet density via GRA grams per cubic centimeter (g cm-3)
MSCL_MS_LoopMagnetic susceptibility SI * 10-5
MSCL_ImpedanceCalculated acoustic impedance meters per second (m/s) times grams per cubic centimeter (g/cm^3) (or: m g s-1 cm-3)
MSCL_Fractional_PorosityAcoustic-calculated porosity
MSCL_Electrical_ResistivityCalculated induced-current resistivity Ohm-meters (Ohm*m)
MSCL_Temperature_Logging_RoomTemperature during logging degress Celsius
Original_Section_IDField ID; original core section name unitless

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Dataset-specific Instrument Name
Generic Instrument Name
Multi-Sensor Core Logger
Dataset-specific Description
Multi-Sensor Core Logger (Geotek Ltd., Daventry, Northamptonshire, UK). Automated core scanning suite.
Generic Instrument Description
The Geotek Standard Multi-Sensor Core Logger (MSCL-S) is a commercially available tool for gathering both physical and chemical properties from core samples in an automated and quality controlled way. See more info from the manufracturer:

Dataset-specific Instrument Name
Universal Percussion Corer
Generic Instrument Name
Percussion Corer
Dataset-specific Description
Universal Percussion Corer (Aquatic Research Instruments, Hope, Indiana): Hand-operated sediment coring device.
Generic Instrument Description
Capable of being performed in numerous environments, percussion coring techniques are just as they sound. Similar to push coring (in which the core barrel is pushed into the sediment by hand), in percussion coring, the core is driven into the sediment by a percussion instrument such as a mallet or slide hammer. Description from:

Dataset-specific Instrument Name
Colinvaux‐Vohnout Livingstone‐type rod‐operated piston corer
Generic Instrument Name
Piston Corer
Dataset-specific Description
Colinvaux‐Vohnout Livingstone‐type rod‐operated piston corer (Geocore, Columbus, Ohio): Hand-operated sediment coring device.
Generic Instrument Description
The piston corer is a type of bottom sediment sampling device. A long, heavy tube is plunged into the seafloor to extract samples of mud sediment. A piston corer uses a "free fall" of the coring rig to achieve a greater initial force on impact than gravity coring. A sliding piston inside the core barrel reduces inside wall friction with the sediment and helps to evacuate displaced water from the top of the corer. A piston corer is capable of extracting core samples up to 90 feet in length.

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Small boats - CRRF
Start Date
End Date
Palau marine lakes

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Project Information

Do Parallel Patterns Arise from Parallel Processes? (PaPaPro)

Coverage: Western Pacific; Palau; Indonesia (West Papua)

This project will survey the taxonomic, genetic, and functional diversity of the organisms found in marine lakes, and investigate the processes that cause gains and losses in this biodiversity. Marine lakes formed as melting ice sheets raised sea level after the last glacial maximum and flooded hundreds of inland valleys around the world. Inoculated with marine life from the surrounding sea and then isolated to varying degrees for the next 6,000 to 15,000 years, these marine lakes provide multiple, independent examples of how environments and interactions between species can drive extinction and speciation. Researchers will survey the microbes, algae, invertebrates, and fishes present in 40 marine lakes in Palau and Papua, and study how diversity has changed over time by retrieving the remains of organisms preserved in sediments on the lake bottoms. The project will test whether the number of species, the diversity of functional roles played by organisms, and the genetic diversity within species increase and decrease in parallel; whether certain species can greatly curtail diversity by changing the environment; whether the size of a lake determines its biodiversity; and whether the processes that control diversity in marine organisms are similar to those that operate on land.

Because biodiversity underlies the ecosystem services on which society depends, society has a great interest in understanding the processes that generate and retain biodiversity in nature. This project will also help conserve areas of economic importance. Marine lakes in the study region are important for tourism, and researchers will work closely with governmental and non-governmental conservation and education groups and with diving and tourism businesses to raise awareness of the value and threats to marine lakes in Indonesia and Palau.

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Program Information

Dimensions of Biodiversity (Dimensions of Biodiversity)

Coverage: global

(adapted from the NSF Synopsis of Program)
Dimensions of Biodiversity is a program solicitation from the NSF Directorate for Biological Sciences. FY 2010 was year one of the program.  [MORE from NSF]

The NSF Dimensions of Biodiversity program seeks to characterize biodiversity on Earth by using integrative, innovative approaches to fill rapidly the most substantial gaps in our understanding. The program will take a broad view of biodiversity, and in its initial phase will focus on the integration of genetic, taxonomic, and functional dimensions of biodiversity. Project investigators are encouraged to integrate these three dimensions to understand the interactions and feedbacks among them. While this focus complements several core NSF programs, it differs by requiring that multiple dimensions of biodiversity be addressed simultaneously, to understand the roles of biodiversity in critical ecological and evolutionary processes.

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Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)

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