intrusion


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intrusion

1. Geology
a. the movement of magma from within the earth's crust into spaces in the overlying strata to form igneous rock
b. any igneous rock formed in this way
2. Property law an unlawful entry onto land by a stranger after determination of a particular estate of freehold and before the remainderman or reversioner has made entry

Intrusion

 

a geological term used in two senses:

(1) The process of magma injection into the body of rock that forms the earth’s crust. The solidification of such injected magma leads to the formation of intrusive rock.

(2) An intrusion is a geological body composed of igneous rock and formed in the process of injection and solidification of mag-matic melt in the earth’s crust (intrusion, intrusive body, plutonic intrusion). In relation to the structure of the country rock, intrusions are classified as concordant and discordant. The first group includes sills, laccoliths, and lopoliths, and the second group includes batholiths, stocks, and dikes. Intrusions are classified according to the depths at which the magmatic intrusion occurred as deep-seated intrusions (abyssal) and shallow-depth intrusions (hypabyssal). In this context the conditions of cooling of the magma and its effect on surrounding rock differ sharply. At shallow depths the cooling is rapid and fine crystalline or porphyritic rock is formed, and contact metamorphosis affects a small area of the country rock. At great depths medium-grain and large-grain rock and major changes in the surrounding rock are characteristic.

intrusion

[in′trü·zhən]
(geology)
The process of emplacement of magma in preexisting rock. Also known as injection; invasion; irruption.
A large-scale sedimentary injection. Also known as sedimentary intrusion.
Any rock mass formed by an intrusive process.

intrusion

Unauthorized access to a computer system or network. See intruder and IDS.
References in periodicals archive ?
The continental environment features the massive intrusions of the midcontinental rift system, such as the Duluth gabbroic complex and associated intrusions, the Nipissing diabase, the huge Muskox Coppermine Mackenzie intrusive event and the Franklin intrusives in the Arctic.
There are essentially two types of system autopsies: 1) an abbreviated autopsy, which identifies the basics of the intrusion and begins to establish probable cause for court orders and search warrants and 2) a comprehensive autopsy, or forensic analysis, which is acceptable for criminal trial.
Third Brigade certified partners combine market and technology expertise, with consulting, product integration, support and training services, to provide customers with a complete host intrusion prevention system that supports their unique business and security needs.
To leverage the deep synergies between host intrusion prevention and SIEM, the program also results in the identification and development of joint sales opportunities, or the strengthening of existing ones.
Third Brigade's host intrusion prevention system uses deep packet inspection to detect and prevent known and zero-day attacks.
High-speed performance and accuracy are the requirements for intrusion prevention but the combination is hard to achieve," said Eric Maiwald, senior analyst, Burton Group.
Companies interested in implementing intrusion detection or intrusion prevention need a huge IT department including employees with specialized skills and around-the-clock availability to properly monitor the network.
With iPolicy's Intrusion Prevention Firewall 6410, network security managers can maintain the performance of their high-speed networks up to 1.
The first three AirDefense patents allowed by the USPTO comprehensively cover wireless intrusion protection and essentially constitute the 'P' in WIPS," he continued.
The Intrusion Prevention Firewall provides an affordable, easy to use solution for this complex problem and helps them create a secure and clean network for their students, faculty and administration organization," said Arun Chandra, CEO of iPolicy Networks.
iPolicy Networks, inventor of the Intrusion Prevention Firewall for real-time network protection, announced today that it has signed a Premier Channel Partner agreement with M&S Technologies, a leading network security reseller and system integrator in Texas.