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Geological analysis relies mainly on chemistry, physics and mathematics. a'a' lava - basaltic lava characterized by a rough or rubbly surface composed of broken lava blocks called clinker.

A-horizon - The uppermost layer of a soil, containing organic material and leached minerals.

The properties of the lime produced were largely influenced by the chemical composition of the limestone burnt, and limestones containing clay minerals produced a lime with weak hydraulic properties.

The hydraulicity of these limes was likely to be weak because of the low firing temperatures, and weakened further if the lime produced was stored as putty.

Observations on Settlement and Subsistence during the Late La Jolla Complex - Preceramic Interface as Evidenced at Site CA-SDI-11,796, Lower San Diego River Valley, San Diego County, California [SCA Proceedings - PDF].

Recovery, Synthesis, and Reporting: 1990s Anza-Borrego Desert State Park Cultural Resources Inventory Conducted by the Archaeological Research Unit, University of California, Riverside [California State Parks].

Most of the bike shops visited to test ride bikes said that the P-38 was ‘twitchy.’ After 10 feet on the P-38. You don’t really ride a P-38, you more or less pilot it.

This is a finely tuned machine worthy of great respect.

Lime mortars have been used with certain reactive materials known as ‘pozzolans’ for almost as long as they have been in existence.

These additives, which include such common materials as fragments of pottery and certain types of brick, may have been introduced into the mix for various reasons, but their effect was to produce a mortar that had some hydraulic properties, was less permeable and generally more durable than an ordinary lime mortar.

The inhibition of atomic diffusion through this highly viscous and polymerized lava explains the lack of crystal growth.

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