DCH-67.55 Cryptotephra: Chemical Composition of Glass Shards from Lake Chala

Mean composition data for the DCH-67.55 cryptotephra layer from Lake Chala. The dataset includes major, minor, and trace element oxide measurements from 32 glass shards analyzed by WDS-EPMA and 19 by LA-ICP-MS, along with secondary glass standard compositions. It was contributed by A.J. Baxter of Utrecht University.

Use Cases

• Correlating volcanic ash layers across regions based on major and minor element oxide compositions.
• Calibrating analytical instruments using the included secondary glass standard measurements.
• Reconstructing past volcanic eruptions and their environmental impact from lake sediment records.
• Developing geochemical fingerprints for specific tephra layers to aid in dating sedimentary sequences.

Strengths

• Includes measurements from 32 individual glass shards for major/minor elements and 19 for trace elements, providing a statistical basis.
• Contains secondary glass standard data from the same instrumental runs, which may support data quality assessment.
• Focuses on a specific cryptotephra layer (DCH-67.55), enabling detailed case studies.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for statistical modeling.
• Last update date is unknown; freshness unverified.

Provenance

Source

Utrecht University

Collection Method

Data gathered via Wavelength-Dispersive Spectrometry Electron Probe Microanalysis (WDS-EPMA) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) on glass shards from the DeepCHALLA project.

Geography

Lake Chala