Geography

lies between the latitudes 14°53′54″ N and 15°40′00″ N and longitudes 73°40′33″ E and 74°20′13″ E. Most of Goa is a part of the coastal country known as the Konkan, which is an escarpment rising up to theWestern Ghats range of mountains, which separate it from the Deccan Plateau. The highest point is the Sonsogor, with an altitude of 1,167 meters (3,827 feet). Goa has a coastline of 101 km (63 mi).

Goa's main rivers are Mandovi, Zuari, Terekhol, Chaporakushavati river and the Sal. The Mormugao harbour on the mouth of the River Zuari is one of the best natural harbours inSouth Asia. The Zuari and the Mandovi are the lifelines of Goa, with their tributaries draining 69% of its geographic area. These rivers are some of the busiest rivers in India. Goa has more than forty estuarine, eight marine and about ninety riverine islands. The total navigable length of Goa's rivers is 253 km (157 mi). Goa has more than three hundred ancient tanksbuilt during the rule of the Kadamba dynasty and over a hundred medicinal springs.

Most of Goa's soil cover is made up of laterites which are rich in ferric aluminium oxides and reddish in colour. Further inland and along the riverbanks, the soil is mostly alluvial and loamy. The soil is rich in minerals and humus, thus conducive to plantation. Some of the oldest rocks in the Indian subcontinent are found in Goa between Molem and Anmod on Goa's border with Karnataka. The rocks are classified as Trondjemeitic Gneiss estimated to be 3,600 million years old, dated by the Rubidium isotope dating method. A specimen of the rock is exhibited in the Goa Univers

Goa has a short winter season between mid-December and February. These months are marked by nights of around 21 °C (68 °F) and days of around 28 °C (84 °F) with moderate amounts of humidity. Further inland, due to altitudinal gradation, the nights are a few degrees cooler. During March 2008 Goa was lashed with heavy rain and strong winds. This was the first time in 29 years that Goa had seen rain during March.Goa features a tropical monsoon climate under the Köppen climate classification. Goa, being in the tropical zone and near the Arabian Sea, has a hot and humid climate for most of the year. The month of May is the hottest, seeing day temperatures of over 35 °C (95 °F) coupled with high humidity. The monsoon rains arrive by early June and provide a much needed respite from the heat. Most of Goa's annual rainfall is received through the monsoons which last till late September.

In the 3rd century BC, Goa was part of the Maurya Empire, ruled by the Buddhist emperor,Ashoka of Magadha. Buddhist monks laid the foundation of Buddhism in Goa. Between the 2nd century BCE and the 6th century CE, Goa was ruled by the Chutus of Karwar as feudatories of the Satavahanas of Kolhapur (2nd century BCE to the 2nd century CE),Western Kshatrapas (around 150 CE), the Abhiras of Western Maharashtra, Bhojas of theYadav clans of Gujarat, and the Konkan Mauryas as feudatories of the Kalachuris.^[14] The rule later passed to the Chalukyas of Badami, who controlled it between 578 to 753, and later the Rashtrakutas of Malkhed from 753 to 963. From 765 to 1015, the Southern Silharas of Konkan ruled Goa as the feudatories of the Chalukyas and the Rashtrakutas.^[15] Over the next few centuries, Goa was successively ruled by the Kadambas as the feudatories of the Chalukyas of Kalyani. They patronisedJainism in Goa.^[16]

In 1312, Goa came under the governance of the Delhi Sultanate. The kingdom's grip on the region was weak, and by 1370 it was forced to surrender it to Harihara I of the Vijayanagara empire. The Vijayanagara monarchs held on to the territory until 1469, when it was appropriated by the Bahmani sultans of Gulbarga. After that dynasty crumbled, the area fell into the hands of the Adil Shahis of Bijapur, who established as their auxiliary capital the