1. Major Rivers

• Saraswati River: An ancient river, now mostly seasonal, flowing through the northern part.
• Banas River: A significant tributary of the Chambal, flowing in the southeastern region.

2. Chambal River

• Source: Aravalli Range in Madhya Pradesh.
• Importance: It is the main river in Rajasthan, supporting irrigation and providing water to various districts.

3. Luni River

• Characteristics: The only major river that flows into the desert, it does not reach the sea.
• Drainage Area: It drains parts of western Rajasthan and is vital for local agriculture.

These rivers play a crucial role in the ecology and economy of Rajasthan, providing water resources for agriculture and daily use.

1. Definition of Orographic Rainfall

• Orographic rainfall occurs when moist air is forced to rise over mountains, cooling and condensing to produce precipitation.

2. Western Ghats

• The Western Ghats receive heavy rainfall during the monsoon, with areas like Munnar getting over 3000 mm annually.

3. Himalayas

• The southern slopes of the Himalayas experience significant rainfall, while the northern slopes remain dry, creating a rain shadow effect.

4. Impact on Agriculture

• Regions with high rainfall support lush vegetation, crucial for agriculture, while drier areas face water scarcity.

Orographic features thus play a vital role in determining rainfall patterns across India, influencing ecosystems and livelihoods.

Landmark Developments During the Palaeozoic Era

1. Formation of Supercontinents

• Gondwana and Laurussia: Major landmasses formed, impacting climate and biodiversity.

2. Marine Life Diversification

• Cambrian Explosion: Rapid increase in diverse marine organisms, including trilobites and brachiopods.

3. Colonization of Land

• Plant Life: The first vascular plants appeared, leading to the development of forests.

4. Evolution of Animals

• Fish and Amphibians: Early fish diversified, and amphibians emerged as the first land vertebrates.

The Palaeozoic era marked crucial biological and geological transformations that set the stage for future evolution.

Physical Characteristics of the Shekhawati Region

• Location: Situated in northeastern Rajasthan.
• Topography: Predominantly arid with sandy plains and small hills.
• Climate: Extreme temperatures with hot summers and cool winters.
• Soil: Mainly sandy and loamy, suitable for drought-resistant crops.

Shekhawati’s unique geography supports a mix of agriculture and traditional architecture.

राजस्थान में सीमेंट उद्योग की अवस्थिति के कारक

कच्चे माल की उपलब्धता

• चूना पत्थर: राजस्थान में चूना पत्थर की प्रचुरता है, जो सीमेंट निर्माण के लिए आवश्यक है।

परिवहन

• अवसंरचना: अच्छी सड़कों और रेलमार्गों से कच्चे माल और तैयार उत्पादों का परिवहन सुगम है।

वृद्धि

राजस्थान में सीमेंट उद्योग ने तेजी से वृद्धि की है, जिससे क्षेत्रीय विकास को बढ़ावा मिला है। प्रमुख कंपनियाँ यहाँ अपने कारखाने स्थापित कर रही हैं।