MY QUESTION :
Yes, there are many references in Puranas and agamas (shaiva and shakta) about the actual origin of the creation. Without her creative force nothing else is possible. All the living and non living objects are due to her creative energy.
Regarding Adi parA shakti:
1-50. The Devî said :-- "Hear, Ye Immortals! My words with attention, that I am now going to speak to you, hearing which will enable the Jîvas to realise My Essence. Before the creation, I, only I, existed; nothing else was existent then. My Real Self is known by the names Chit, Sambit (Intelligence), Para Brahma and others. My Âtman is beyond mind, beyond thought, beyond any name or mark, without any parallel, and beyond birth, death or any other change or transformation. My Self has one inherent power called Mâyâ. This Mâyâ is not existent, nor non-existent, nor can it be called both. This unspeakable substance Mâyâ always exists (till the final emancipation or Moksa).
I am Nirguna. And when I am united with my S'aktî, Mâyâ, 1 become Saguna, the Great Cause of this world. This Mâyâ is divided into two, Vidyâ and Avidyâ. Avidyâ Mâyâ hides Me; whereas Vidyâ Mâyâ does not. Avidyâ creates whereas Vidyâ Mâyâ liberates. (Devi Bhagvatam)
In Hinduism, Shakti (Devanagari: शक्ति; from Sanskrit shak, "to be able"), also spelled as Sakthi, meaning "power" or "empowerment" is the primordial cosmic energy and represents the dynamic forces that are thought to move through the entire universe. Shakti is the concept or personification of divine feminine creative power, sometimes referred to as 'The Great Divine Mother' in Hinduism. As the mother she is known as Adi Parashakti or Adishakti. On the earthly plane, Shakti most actively manifests through female embodiment and creativity/fertility, though it is also present in males in its potential, unmanifest form. (wiki)
According to Shaktism and Hindu mythology, Adi Para Shakti—the Goddess, Devi—is the Supreme Being. She is also popularly referred to as "Adi Shakti", "Parama Shakti", "Maha Shakti", "Mahadevi", or even simply as "Shakti". "Parama" means absolute, "Satya" means the Truth as per many Shakta texts.1 The Devi Bhagawata Mahapurana states that Adi Parashakti is the original creator, observer and destroyer of the whole universe. (wiki)
Regarding Tri-murtis:
38-43. O Lord of Rama! I am sprung from the lotus from thy navel and have become the Lord of this whole universe; who is there in this universe that is superior to Thee; kindly say this to me. O Lord of the world? Thou art the Origin of all, the Cause of all causes, the Creator, Preserver and Destroyer and the capable Doer of all actions. O Maharaja! at Thy will, I create this whole universe and Rudra destroys iu due time this world. He is always under Thy command. O Lord! By Thy command the Sun roams in the sky; the wind blows in various auspicious or inauspicious ways and the fire is giving heat and the cloud showers rain. I don’t see in the three Lokas any one superior to Thee. Then whom art Thou meditating while being questioned by his very intelligent son S’uka Deva! not born in the usual way from womb, Dvaipâyana expounded all the secret excellent meanings of the Purâna and thereby I also came to know them also. O saintly persons! Thus S’uka Deva, sincerely earnest to cross this endless bottomless ocean of S’amsara, tasted of the wonderful traits of the Veda, the Kalpa tree, this S’rimad Bhâgavata with its numerous stories and anecdotes with great eagerness and intense pleasure.
44-50. Thus hearing Brahmâ's words, Bhagavan Nârâyana spoke :-- “O Brahmân! I now speak out my mind to you; listen carefully. Though the Devas, Dânavas and men and all the Lokas know that You are the Creator, I am the Preserver and Rudra is the Destroyer, yet it is to be known that the saints, versed in the Vedas, have come to this conclusion by inference from the Vedas that the creation, preservation, and destruction are performed by the creative force, preservative force and destructive force. The Rajasik creative force residing in you, the Sattvik preservative force residing in me, and the Tamasik destructive force residing in Rudra are the all-in-all. When these Saktis become absent, you become inert and incapable to create, I to preserve and Rudra to destroy.
O intelligent Suvrata! We all are always under that Force directly or indirectly; hear instances that you can see and infer. At the time of Pralaya, I lie down on the bed of Ananta, subservient to that Force; again I wake up in the time of creation duly under the influence of Time.
51-54. I am always subservient to that Maha S’akti; (under Her command) I am engaged in Tapasyâ for a long time; (By Her command) some time I enjoy with Lakshmî; some time I fight battles, terrible to all the Lokas, with the Dânavas, involving great bodily troubles. O Know of Dharma! It was before Your presence that I fought hand to hand fight for five thousand years before
55-61. O highly fortunate one! you realised then the great S’akti, higher than the highest and the cause of all causes; then why are you asking again and again that question. By the will of that S’akti, I have got this idea of man and roam on the great ocean; in yuga after yuga, I assume by Her will, the Tortoise, Boar, Man-Lion, and Dwarf incarnations. No one likes to take birth in the womb of inferior animals (especially birds). Do you think that I willingly take unpleasant births as in the womb of boars, tortoise, i.e., certainly not. What independent man is there who abandons the pleasurable enjoyment with Laksmi and takes birth in inferior animals as fish, etc. or leaves his seat on the seat of Gaduda and becomes engaged in great war-conflicts. O Svayambhu! In ancient days you saw before your eyes that my head was cut off when the bowstring suddenly gave way; and then you, brought a horse's head and by that help, the divine artist Visvakarma, stuck that on to my headless body. O Brahmâ! Since then I am known amongst men by the name of “Hayagrîva”. This is well-known to you. Now say, were I independent, would such an ignominy have happened to me? Never. Therefore I am not independent; I am in every way under that S’akti. O Lotus-born! I always meditate on that S’akti; and I do not know any other than this S’akti”.
