Page 20 - Volcanic Textures A Guide To The Interpretation of Textures In Volcanic Rocks

Table 1 Descriptive names for coherent lavas and intrusions.
Graphic logging technique appearance and, therefore, requires disciplined
observations, focusing on internal variations, the nature
Graphic logging is pictorial representation of sections and position of contacts, and relationships between
through sedimentary and/or volcanic sequences. The successive parts of the sequence. This style of logging is
aim is to record the variations in textures, structures, not only a thorough system for documenting
bedforms, grain size, and contact relationships by a sedimentary and volcanic sequences, but also steers
schematic, simplified, pictorial summary. Graphic observations toward those features that aid
logging is an especially effective way of representing interpretation of emplacement processes and
this information for drillcore sections. The log should depositional environments. Most standard exploration
remind the observer, at a glance, of the actual deposit drill log forms and data sheets are designed for

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