paleocurrent analysis

Knowledge graph centered on paleocurrent analysis with 15 nodes and 27 connections. Top connected: Sediment particle size distribution, jar method, Stratigraphic section measurement, Las Vegas, alluvial stratigraphy.

Method synopsis

Systematic measurement of paleocurrent directions from sedimentary structures using compass bearings, followed by statistical analysis to determine transport directions and consistency ratios.

Synthesized from method descriptions across 1 paper using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Sedimentology of braided alluvial interval of Dakota Sandstone, northeastern New Mexico (1976). Implementations in other papers (listed below) may differ.

1. Measure paleocurrent directions
   At each of the 12 sections, 25 paleocurrent directions were measured using a Brunton compass from trough axes, planar foresets, and current ripples. Corrections for structural dip were made only on the western side of the area where the braided interval dips 10 to 16 degrees SE or NE
   Quantities: 25 readings per section, 300 total readings across all sectionsDuration: Not specifiedConditions: Field measurements taken from outcrop exposures
   Equipment: Brunton compass
2. Process paleocurrent data
   Each sieve fraction was weighed to the nearest one-hundredth of a gram using a Fortran computer program GSZW. Statistical parameters including mean, phi deviation, skewness, and kurtosis were calculated and then averaged for each of the 12 sections
   Quantities: Statistical analysis of all 300 paleocurrent readingsDuration: Not specifiedConditions: Laboratory data processing
   Equipment: CURT computer program, Fortran computer program

Typical Equipment

• Brunton compass
• CURT computer program

Output Measurements

• vector mean direction
• consistency ratio
• standard deviation

Papers Using This Protocol (1)

Places Where Used